PCP Telecommunications Cabling Standard -Updated Version

Palestinian National Authority

Ministry Of InteriorPOLICE

ICT Department

السلطـة الوطنيــة الفلسطينيـةوزارة

الـداخـليــة الشرطة

ادارة ألتصالت وتكنولوجيا المعلومات

Palestinian Civil Police

ICT Department

Telecommunications cablingstandard

Version: 025.3Last updated: 01.12.2010 19:19:54

For more information on this document please contact the following people:Suleiman KhatibICT DirectorPalestinian Civil Police+970 59 972 [email protected]

Azim Abu ArrahProject manager / ICT departmentPalestinian Civil Police+970 59 935 [email protected]

Palestinian Civil Police – ICT Department

Contents 1 Introduction.....................................................................................................8

1.1 Purpose.....................................................................................................8 1.2 Definitions.................................................................................................8

2 General and minimum requirements...............................................................9 2.1 Sub-contracting........................................................................................9 2.2 Experience................................................................................................9 2.3 Designing and planning............................................................................9

2.3.1 Designer Qualifications......................................................................9 2.3.2 Design Standards.............................................................................10 2.3.3 Design approval...............................................................................10

2.4 Scope of work.........................................................................................10 2.5 Installation work.....................................................................................11 2.6 Conflict resolution...................................................................................11 2.7 Clarifications...........................................................................................11 2.8 Deviations...............................................................................................11 2.9 Co-ordination..........................................................................................12 2.10 Continuity of the services.....................................................................12 2.11 Quality..................................................................................................12 2.12 Specifications........................................................................................12 2.13 Samples................................................................................................13 2.14 Availability of the material....................................................................13 2.15 Delivery................................................................................................13 2.16 Aesthetic appearance...........................................................................14 2.17 Cleanliness............................................................................................14 2.18 Prevention of noise and vibration.........................................................14 2.19 Warranty and certifications...................................................................14 2.20 Spare parts...........................................................................................15 2.21 Insurance..............................................................................................15 2.22 Permits and approvals..........................................................................15 2.23 Regulations...........................................................................................15 2.24 Personnel..............................................................................................15 2.25 Security clearances...............................................................................15 2.26 Licenses................................................................................................16 2.27 Climatic conditions...............................................................................16 2.28 Final Acceptance & System Certification..............................................16

3 Technical Specifications.................................................................................17 3.1 General requirements.............................................................................17

3.1.1 Standards.........................................................................................17 3.1.1.1 Standards for telecommunications installations........................17 3.1.1.2 Standards for electrical installations.........................................17

3.1.1.2.1 Conductors ........................................................................17 3.1.1.2.1.1 Cable and Wires...........................................................18 3.1.1.2.1.2 Cable Termination........................................................18

3.1.1.3 Other standards and requirements...........................................18

PCP Telecommunications cabling standard v025.3 Page 2 of 85


3.2 Sockets types definition..........................................................................19 3.3 Mounting heights....................................................................................19 3.4 Electrical supporting devices..................................................................19

3.4.1 General............................................................................................19 3.4.1.1 Voltage......................................................................................19 3.4.1.2 Description................................................................................19 3.4.1.3 Reference standards..................................................................19

3.4.2 Sockets.............................................................................................20 3.4.3 Junction boxes..................................................................................20 3.4.4 Switches...........................................................................................20 3.4.5 Mounting boxes................................................................................20 3.4.6 Pull boxes /junction boxes................................................................20

3.5 Work areas..............................................................................................21 3.5.1.1 Office.........................................................................................21 3.5.1.2 Access control...........................................................................21 3.5.1.3 Video surveillance.....................................................................21

3.5.1.3.1 Indoors................................................................................21 3.5.1.3.2 Outdoors.............................................................................21

3.5.1.4 TV equipment............................................................................22 3.5.1.5 Two-way radio equipment.........................................................22

3.6 Types of cables.......................................................................................22 3.6.1.1 Telecommunications..................................................................22

3.6.1.1.1 Cable – computer network..................................................22 3.6.1.1.1.1 General........................................................................22 3.6.1.1.1.2 Installation...................................................................22

3.6.1.1.1.2.1 termination...........................................................23 3.6.1.1.1.2.2 length....................................................................23 3.6.1.1.1.2.3 ties and bundling..................................................23

3.6.1.1.2 Cable – TV...........................................................................23 3.6.1.1.2.1 termination..................................................................23 3.6.1.1.2.2 length...........................................................................23

3.6.1.1.3 Cable – Stationary two-way radio equipment.....................23 3.6.1.1.3.1 termination..................................................................23 3.6.1.1.3.2 length...........................................................................23

3.6.1.2 Electrical....................................................................................24 3.6.1.2.1 General...............................................................................24 3.6.1.2.2 Products..............................................................................24

3.6.1.2.2.1 Single core PVC insulated cables.................................24 3.6.1.2.2.2 Flexible cables.............................................................24 3.6.1.2.2.3 Cross-linked polyethylene (XLPE) insulated unarmoured or steel wire armored and PVC sheathed cables.............................24

3.6.1.2.3 Inspection...........................................................................25 3.6.1.2.4 Sub-circuit wiring - lighting.................................................25 3.6.1.2.5 Sub-circuit wiring -small power...........................................25 3.6.1.2.6 Main-circuit wiring - power (single and 3 phase)................26 3.6.1.2.7 Flexible cable installation...................................................26 3.6.1.2.8 Internal cable installation...................................................27 3.6.1.2.9 External cable installation..................................................28



3.6.1.2.10 Jointing and terminating cables........................................29 3.6.1.2.11 Sleeves, tapes and sealing compound.............................30

3.7 Telecommunications distribution systems..............................................31 3.7.1 Horizontal distribution systems........................................................31

3.7.1.1 Sizing.........................................................................................31 3.7.1.2 Topology....................................................................................31 3.7.1.3 Location.....................................................................................31 3.7.1.4 Electrical segregation................................................................31

3.8 Pathways and raceways..........................................................................32 3.8.1 General............................................................................................32 3.8.2 Size selection...................................................................................32 3.8.3 Backbone and horizontal raceways..................................................32

3.8.3.1 Cable trays................................................................................32 3.8.3.1.1 Cable tray supports and racks............................................33 3.8.3.1.2 Installation..........................................................................34

3.8.3.2 Cable ladders............................................................................34 3.8.3.2.1 Installation..........................................................................34

3.8.3.3 Cable trunking...........................................................................35 3.8.3.3.1 Cable trunking (metal)........................................................35 3.8.3.3.2 Cable trunking (PVC)..........................................................36 3.8.3.3.3 Installation..........................................................................36 3.8.3.3.4 Installation of telecommunications cables..........................36 3.8.3.3.5 Installation of mains power cables.....................................37

3.8.3.4 Outdoor cable trays ..................................................................37 3.8.3.5 Underground pathways.............................................................37

3.8.3.5.1 Pathway System.................................................................37 3.8.3.5.2 General Design Considerations..........................................37 3.8.3.5.3 Underground Cable Vaults (UCVs)......................................38

3.8.3.5.3.1 Manholes......................................................................39 3.8.3.5.3.2 Handholes/Pullholes.....................................................39 3.8.3.5.3.3 Ducts (Conduit) ...........................................................39

3.8.3.5.3.3.1 Duct Length...........................................................40 3.8.3.5.3.3.2 Duct Entrances In UCV’s or Buildings....................40

3.8.3.5.3.4 Ductbanks....................................................................41 3.8.3.5.3.5 Innerduct.....................................................................41

3.8.3.5.4 Grounding and Bonding......................................................42 3.8.3.6 Aerial pathways.........................................................................42 3.8.3.7 Underfloor duct.........................................................................42

3.8.3.7.1 Installation..........................................................................42 3.8.3.8 Access floor...............................................................................42 3.8.3.9 Conduit......................................................................................43

3.8.3.9.1 Metal conduits....................................................................43 3.8.3.9.1.1 Installation...................................................................43

3.8.3.9.2 Flexible conduits.................................................................44 3.8.3.9.2.1 Installation...................................................................44

3.8.3.9.3 PVC conduits.......................................................................44 3.8.3.9.3.1 Installation...................................................................45

3.8.3.9.4 Electrical metallic tubing (EMT)..........................................46



3.8.3.10 Ceiling pathways.....................................................................46 3.8.4 Perimeter raceways.........................................................................46

3.8.4.1 Built in walls (recessed).............................................................47 3.8.4.2 Surface installed trunks.............................................................47 3.8.4.3 Furniture raceways....................................................................47

3.9 Equipment rooms....................................................................................47 3.9.1 Entrance facility...............................................................................47 3.9.2 Telecommunications equipment room.............................................47

3.9.2.1 Definition...................................................................................48 3.9.2.2 Location.....................................................................................48 3.9.2.3 Security.....................................................................................48 3.9.2.4 Size requirements.....................................................................49 3.9.2.5 Other requirements...................................................................49 3.9.2.6 Electrical requirements.............................................................49 3.9.2.7 Cabling in equipment room.......................................................49 3.9.2.8 Equipment rack.........................................................................50 3.9.2.9 Patch panels..............................................................................50

3.10 Electrical distribution systems..............................................................50 3.10.1 Main Distribution Equipment .........................................................50

3.10.1.1 General....................................................................................50 3.10.1.1.1 Description.......................................................................50 3.10.1.1.2 Standards ........................................................................51

3.10.1.2 Main low tension panel boards................................................51 3.10.1.3 Busbars...................................................................................52 3.10.1.4 Air circuit breakers..................................................................53 3.10.1.5 Current transformers...............................................................55 3.10.1.6 Instruments.............................................................................55 3.10.1.7 kWh meters.............................................................................55 3.10.1.8 Fuse switches..........................................................................56 3.10.1.9 Moulded case circuit breakers.................................................56 3.10.1.10 Earth leakage relays..............................................................58

3.10.1.10.1 Earth Fault Relay.............................................................58 3.10.1.10.2 Current Sensors (Toroids)...............................................58

3.10.1.11 Earth bus...............................................................................59 3.10.1.12 Central UPS...........................................................................59

3.10.2 Main and sub-main distribution boards..........................................60 3.10.3 M.C.B. distribution boards..............................................................60

3.10.3.1 MCB.........................................................................................61 3.10.3.2 Residual current circuit breaker (RCCB)..................................62

3.10.4 Contacors.......................................................................................63 3.10.5 Pulse relays....................................................................................63 3.10.6 Automatic voltage stabiliser..........................................................63 3.10.7 Circuits and connections................................................................63 3.10.8 Flexible conduits............................................................................64

3.11 Earthing, bonding and surge protection...............................................64 3.11.1 Telecommunications.......................................................................64

3.11.1.1 Standards................................................................................64 3.11.1.2 Other.......................................................................................64



3.11.2 Electrical........................................................................................64 3.11.2.1 Standards................................................................................64 3.11.2.2 Grounding connection bar.......................................................65 3.11.2.3 Grounding conductors installation...........................................65 3.11.2.4 Building systems grounding....................................................66 3.11.2.5 Supplementary and equi-potential bonding............................66 3.11.2.6 Field quality control ................................................................66

3.12 Fire stopping.........................................................................................67 3.12.1 Sealing (fire barrires).....................................................................67

3.13 Administration......................................................................................67 3.13.1 Telecommunications labeling.........................................................67

3.13.1.1 Backbone cable labeling.........................................................68 3.13.1.1.1 Backbone between buildings............................................68 3.13.1.1.2 Backbone inside buildings................................................68

3.13.1.2 Horizontal cable labeling.........................................................68 3.13.1.3 Work area labeling..................................................................69

3.13.1.3.1 Labeling the faceplate sets in the work area....................69 3.13.1.3.2 Labeling the sockets in the work area:.............................69

3.13.1.4 Patch panel labeling................................................................69 3.13.1.5 Telecommunications equipment rooms...................................69

3.13.2 Electrical labeling and identification..............................................70 3.13.2.1 General....................................................................................70 3.13.2.2 Standards................................................................................70 3.13.2.3 Products..................................................................................70

3.13.2.3.1 Label and identification....................................................70 3.13.2.3.2 Nameplates and labels.....................................................71 3.13.2.3.3 Wire markers....................................................................71 3.13.2.3.4 Colour coding of raceways................................................71 3.13.2.3.5 Circuit identification charts...............................................72 3.13.2.3.6 Cable identification tags...................................................72 3.13.2.3.7 Cable warning tapes.........................................................72 3.13.2.3.8 Cable markers .................................................................73 3.13.2.3.9 Equipment warning/danger signs.....................................73

3.13.2.4 Administration labeling...........................................................74 3.13.2.4.1 Labeling the Boards..........................................................74

3.13.2.4.1.1 Main Board.................................................................74 3.13.2.4.1.2 Sub-Main Board..........................................................74 3.13.2.4.1.3 Distribution Board......................................................74 3.13.2.4.1.4 Circuit Breakers..........................................................75 3.13.2.4.1.5 Faceplate set..............................................................75 3.13.2.4.1.6 Sockets......................................................................75

3.13.2.4.1.6.1 The main socket connected directly to the board....................................................................................................75 3.13.2.4.1.6.2 The sockets connected to the other sockets.......75

3.13.2.5 Installation...............................................................................75 3.13.2.5.1 Preparation.......................................................................75 3.13.2.5.2 Installation........................................................................76

3.13.3 Plans, drawings and diagrams.......................................................76



3.13.3.1 Issuing the drawings...............................................................76 3.13.3.2 Design and as installed drawings............................................76

3.14 Testing..................................................................................................77 3.14.1 Purpose of testing..........................................................................77 3.14.2 Witness testing..............................................................................77 3.14.3 Category 6 Permanent Link............................................................78

3.14.3.1 References and requirements.................................................78 3.14.3.2 Testing instructions – Category 6 Permanent Link...................78 3.14.3.3 Performance Test Parameters..................................................79

3.14.3.3.1 Wire Map...........................................................................79 3.14.3.3.2 AC Wire Map.....................................................................79 3.14.3.3.3 Length..............................................................................79 3.14.3.3.4 Insertion Loss (Attenuation)..............................................79 3.14.3.3.5 NEXT Loss, pair-to-pair.....................................................80 3.14.3.3.6 PSNEXT Loss.....................................................................80 3.14.3.3.7 ELFEXT Loss, pair-to-pair..................................................80 3.14.3.3.8 PSELFEXT Loss..................................................................81 3.14.3.3.9 Return Loss.......................................................................81 3.14.3.3.10 ACR (Attenuation to crosstalk ratio)...............................81 3.14.3.3.11 PSACR.............................................................................81 3.14.3.3.12 Propagation Delay..........................................................82 3.14.3.3.13 Delay Skew.....................................................................82

3.14.3.4 Test Result Documentation......................................................82 3.14.4 Electrical cables.............................................................................83

3.14.4.1 General....................................................................................83 3.14.4.2 Cable.......................................................................................83 3.14.4.3 Grounding ...............................................................................84

3.14.4.3.1 Operation Control.............................................................84 4 Project handover folder.................................................................................85

4.1 Paper handover information...................................................................85 4.2 Electronic handover information.............................................................86



1 Introduction

1.1 Purpose

The purpose of this specification document is to describe the standards of planning and installation of telecommunications cabling and systems at any location of the Palestinian Civil Police and ensure that all installed systems are compatible with current and expected future applications.

1.2 Definitions

SupervisorThe representative of the client assigned to supervise the implementation of the contract.ContractorThe company which is submitting the tender and later also the company with the contract has been signed, as applicable in the relevant parts.



2 General and minimum requirements

2.1 Sub-contracting

The Contractor is not allowed to use any sub-contractors to perform any works, including preparation, installation or testing, without written permission from the Supervisor.Should the Contractor wish to use any sub-contractors, he must submit to the Supervisor for approval: the name of the sub-contractor, description of work to be done, details of his experience and his staff qualifications and experience.

2.2 Experience

The Contractor shall demonstrate and provide proof of:• minimum of 5 years of experience in design and installation of the

electrical systems described in this document. Experience not directly related to the design and installation, such as sales and/or marketing or project management, is not acceptable;

• minimum of 3 years of experience in design and installation of the communications systems described in this document. Experience not directly related to the design and installation, such as sales and/or marketing or project management, is not acceptable;

• previous experience in computer network cabling installation with minimum 10 contracts; size of at least 5 contracts must be minimum 500 TIA/EIA-568-B.2-1 (Category 6) computer network connection points.

2.3 Designing and planning

Before commencing work, Contractor shall, after a site survey, prepare and present the following documents:

1. description of the works to be done and the end result;2. draft project drawings as defined in section “Plans, drawings and

diagrams”. The plan shall contain the actual locations, dimensions, quantities and types of all material and works;

3. detailed bill of quantities, including specifications for each item or work;4. prices per unit and total;5. time required to complete the assignment (project plan) including:

1. total time2. number of man-hours in each specialization

6. when the work can be started;7. certificates of the installation team members passing the material

manufacturer/vendor training;

2.3.1 Designer Qualifications

It is required that all systems be designed by an experienced (preferably certified) Designer. The design project shall be managed under the direct supervision of that Designer. Project design related communications between



the Supervisor and the Contractor shall be mainly through the Designer.It is desirable that the Designer have the following qualifications:

• Professional Engineer (P.E.) in the electrical engineering field• LAN certification• MCSE or CCNA certification

In addition, the Designer shall have the following qualifications: • The Designer shall demonstrate that he/she has designed or has had

personal design oversight of a minimum of three projects similar in size and construction cost to the current project.

• The Designer shall not be affiliated with any manufacturer associated with the communications distribution system industry.

• The Designer shall be completely familiar and conversant with the standards listed in this specification.

2.3.2 Design Standards

It is required that the Designer be thoroughly familiar with the content and intent of these references, standards, and codes and that the Designer be capable of applying the content and intent of these references, standards, and codes to all communications system designs executed as part of the Contract.

2.3.3 Design approval

After approval by the Supervisor, Contractor may start work.

2.4 Scope of work

The work included in these specifications is for the complete services for the project. The work described and included in this specification is for the manufacture works, testing, supply, delivery to site, erection, connection, site testing, demonstrating, commissioning and maintaining for required duration of all equipment and installation as described in this specifications and shown on contract drawings. All material and devices not indicated but required for the proper and efficient installation of the system must also be included in the proposal.Any works whether or not shown on the drawings and/or described in the specifications but which can reasonably be inferred as necessary for the completion and proper operation of the works will also form part of the extent of the contract. He shall include in his cost all the electrical requirements (even if they were not mentioned in the BoQ or drawings) to have a fully functional system as specified and as recommended by the manufacturer and/or the international standard.If the Contractor does not mention in the proposal any issues preventing the completing of the work as per specifications and drawings, it will be implicitly understood, for both parties, that the Contractor has included the cost of overcoming these issues within his proposal.



2.5 Installation work

Installation guidelines of the original manufacturer of the equipment and material must be followed and original manufacturer recommended installation material, tools and accessories must be used. Proof of this must be provided at the request, failure to do this without delay may result in suspension of works, and after reasonable time, disqualification of the Contractor.The Contractor shall install all temporary electrical facilities required for construction and safe operation. No wire, bus or electrical equipment which is part of any of the previously existing or permanent electrical systems may be used for temporary electrical service for construction operations.

2.6 Conflict resolution

Any conflicting information regarding the standards, this document or interpretation of those must be clarified with the Supervisor which will issue a decision.

2.7 Clarifications

This document’s goal is to enhance and clarify aspects of the standards that relate to the design of the PCP telecommunications system. These specifications describe standards to which PCP adheres.The document covers the installation of work areas, horizontal cabling, backbone cabling, cable pathways, fire-code compliance, wire identification, cross-connects, and other requirements.This document covers telecommunications installations and electrical installations related to it.Any unclarity regarding the standards, this document, interpretation of those or related to actual installation work, or any unforeseen circumstances must be immediately addressed to the Supervisor.All material shall be selected and installed for conditions in which it will be required to perform.

2.8 Deviations

If the Contractor feels that deviation from a given standard is warranted, the Contractor shall submit a written deviation request to the Supervisor. The request will, at a minimum, indicate the standard from which there is a proposed deviation, the substitution being proposed in place of the standard, the reason the request is being made, and an explanation of the justifications (economic, technical or otherwise) for the deviation. The Contractor may, upon written approval from the Supervisor, incorporate the design deviation into the overall design. Approval is required on a project-by-project basis. The Contractor should not assume that a deviation approval for one project means that the deviation will necessarily be approved for a subsequent project. Any deviation which is not approved in written may lead to rejection of the work and disqualification of the Contractor.



2.9 Co-ordination

The Contractor shall be held solely responsible for the proper co-ordination of all phases of the work and timely delivery to the site of all equipment and materials for proper execution of the work.It is the sole responsibility of the Contractor to fully co-ordinate the work with all or any other disciplines and to ensure proper phasing of the work to ensure continuity of all works under this contract. If it becomes necessary to remake any part of these works or that of any other discipline or trade as a result of poor or badly timed co-ordination, then all costs associated with remaking those works will be borne by the Contractor.The Contractor shall co-ordinate with all supply undertakings and authorities and shall include for attendance along with all costs involved in re-directing existing services.The Contractor shall take into consideration all statutory and local requirements issued by the Electricity Local Authority, Central Government, Broadcasting Authority, Telephone and Telecommunications Authorities, Civil Defense along with any other requirements to be considered for the correct and legal operation of the electrical and telecommunication installation or equipment connected to the installation as part of this contract.

2.10 Continuity of the services

No service shall be disconnected, interrupted or changed without prior permission. When interruption of services is required, all persons concerned shall be notified and shall agree upon a time.

2.11 Quality

Quality shall be of the best grade for each type or class of material or equipment, even though such quality may not be stated specifically in the specifications. All materials and products shall be new and manufactured by well known firms and shall be sound and uniform in quality, size, shape, color and texture and shall be free from cracks, warpage or other defects. Energy consuming equipment shall be of the energy saving type, wherever relevant and applicable.

2.12 Specifications

The Contractor shall provide the complete technical specifications / data sheets with each type or model of material or equipment proposed and installed.The specifications shall include at least the following details, if they are applicable to the material:

• Name of the manufacturer• Country of origin• Dimensions and dimensional details needed for installation and

maintenance.• Weights• Construction• Manner of installation



• Technical performance of the electrical material and equipment, all that applies, but not limited to:◦ Current rating◦ Maximum conductor operating temperature◦ Volt drop/amp/meter◦ Impedance: Separate resistance and reactance values of single and

multi-core cables◦ Resistance of armoring in ohms/1000 meters length of cable◦ Characteristic curves for short circuit rating◦ Minimum bending radius

• Delivery time from the date of orders.• Method of obtaining spare parts for maintenance and list of spare parts

sufficient for a 2 years period.• Copies of test reports or certificates.• Control schematics and wiring diagrams.• Operating instructions• Maintenance manuals• Spare parts lists with part numbers for various components• Names of manufacturers' local authorized representatives and service

agents

2.13 Samples

The Contractor shall provide a sample of the exact make, model and finish proposed for each material required.

2.14 Availability of the material

All materials/equipments/fittings manufacturers selected by the Contractor shall have established local agents.The Contractor shall have, at any time during the validity of the contract, sufficient stock of required material to start work with a new assignment within 10 working days from the day of receiving the order.Material shall only be purchased from manufactures specializing in the manufacture or the type of material mentioned.Manufacturer's shall provide proof of supply of similar and compatible types of material to known users for a period not less than 5 years.

2.15 Delivery

Care shall be taken during delivery and storing to avoid damage to the material.Before acceptance on site, material shall be inspected for:

1. Damage2. Compliance with specification3. Quantity

material shall be stored in factory installed coverings in a clean, dry indoor space which provides protection against the weather.



2.16 Aesthetic appearance

All work and installation must result in a careful and aesthetically pleasing outcome, and display choiceness and high level of professionalism.

2.17 Cleanliness

The Contractor shall keep the site clean and orderly during the work. All material and stock shall be stored in an orderly manner.During work, all existing surfaces, openings and systems must be protected from damage, dirt, dust and stains.After the installation is complete, the Contractor shall clean all systems, remove all temporary labels and protections.The Contractor shall allow in his tender for the final cleaning down and painting of all scratched or damaged material, equipment or surfaces.

2.18 Prevention of noise and vibration

Provision shall be made to minimize noise and vibration. However, different manufacturer's equipment will have varying sound and vibration characteristics. The Contractor shall be entirely responsible for ensuring that equipment installed does not transmit unnecessary noise or vibration.All equipment installed in plant rooms and outside areas shall not be audible in the occupied areas.Any vibration isolators, isolating bases, flexible connections, silencers, other acoustic treatment or anti-vibration precautions necessary shall be included in the rates for the equipment.The Contractor shall submit proof of the selected noise proofing measures before commencement of work.The Contractor shall submit for approval the noise generation by the plant selected so that structural soundproofing measures can be evaluated. This means either data on the acoustic capacity level in relation to frequency, or the sound pressure level measured at 1 meter from the plant at octave median frequencies from 63 Hz to 4000Hz. Details of the spatial and operational conditions shall also be given.All costs of noise sound level measurements and any repeat measurements, necessary if acoustic requirements are not met, shall be allowed for by the Contractor.

2.19 Warranty and certifications

Contractor shall warrant that the entire cable installation will be free from defects in material and workmanship and will support any current and/or future application designed for and specified by the applicable standards for a 15-year period.Contractor shall provide warranty repair services:

• during first 12 months of the warranty period: telephone service 24h, with response time of 4 hours during 08:00-17:00

• during the 13-36th months of the warranty period: telephone service 08:00-17:00 on workdays, with response time of 2 workdays



Contractor shall provide details of warranty coverage under the following circumstances:

• Contractor ceases trading• Contractor ceases to be accredited/licensed

2.20 Spare parts

Contractor shall provide 2% of installation material to the client for future use before certificate of completion of the project. The spare parts lists shall be approved by the client.Contractor shall describe the procedure of obtaining the spare parts.

2.21 Insurance

Contractor must have a valid General Liability insurance covering the time of work and at least 3 months of warranty period, with a minimum rate of $1,000 (one thousand US dollars) for each work area set (network endpoint) in each site the Contractor has been contracted to install. This can be replaced or combined with a guarantee deposit in written agreement with client. The guarantee will cover possible damage caused to the structure, infrastructure, people, or any other damage and will ensure the standards and regulations are followed and that the outcome will correspond to the requirements set out in this document. The Contractor shall be held responsible for all damage done until his work is fully and finally accepted.

2.22 Permits and approvals

Contractor will be responsible for all permits applicable. The Contractor shall be responsible for obtaining design and as-built approvals from all local authorities, whenever such approvals are needed, for all works executed by him or his sub-contractors.

2.23 Regulations

The Contractor shall comply with all statutory requirements and regulations issued by the local authorities within whose area of jurisdiction the site is contained.

2.24 Personnel

Any person involved in installation work shall be suitably trained and familiar with the tools, material and equipment being used.

2.25 Security clearances

The Contractor’s employees, who are required to enter security installations or gain access to sensitive/confidential information in order to perform work under the Contract, will be required to obtain appropriate security clearance. The Contractor must obtain security clearances for his employees and employees of subcontractors and for any person sent on the Contractor’s behalf to work on the project in advance and to undertake to obtain such security clearances in a



manner that causes no delay to performance of the work.System maintenance, or any other activity relating to the Contract, will be performed exclusively by individuals who underwent appropriate security clearance and have received PCP approval.

2.26 Licenses

Contractor must be licensed according to the local regulations in the low voltage data communication trade for a minimum of 3 years if such requirement exists in the legislation.

2.27 Climatic conditions

Extremes of temperature and humidity are experienced. Sand and dust storms occur and even on comparatively still days, fine dust is carried in the atmosphere.All equipment and materials forming the installation work shall be designed and constructed to provide satisfactory service without any harmful effects for prolonged and continuous use in the climate of the project.Generally, the following temperatures shall be made as design criteria:

A. 35°C if installed within buildings having good heat insulating properties and adequate ventilation.

B. 40°C if installed in well ventilated positions and shaded from direct sunlight throughout the day.

C. 45°C if exposed to direct sunlight.Minimum temperatures likely to occur are:

A. -5°C outdoors. B. 10°C indoor.

The above temperatures do not take into consideration heat generated from the equipment itself or from any other equipment installed in the vicinity.The capacity and rating of all equipment and materials given are Local rating, i.e. rating when equipment are operating under Local Climatic Conditions. Any de-rating factors applied should be clearly indicated.Where specific sizes are indicated e.g. cable sizes, due allowances have been made in the design for the climatic conditions of project and de-rating has been applied.

2.28 Final Acceptance & System Certification

Completion of the installation, in-progress and final inspections, receipt of the project handover folder (in 3 copies), and successful performance of the cabling system for a two-week period will constitute acceptance of the system. After this the final acceptance certificate will be signed.



3 Technical Specifications

3.1 General requirements

3.1.1 Standards

3.1.1.1 Standards for telecommunications installations

All the PCP telecommunications installations follow these standards:• ANSI/TIA/EIA-569: Commercial Building Standard for Telecommunications

Pathways and Spaces• ANSI/TIA/EIA-758: Customer-owned Outside Plant Telecommunications

Infrastructure Standard• ANSI/TIA/EIA-J-STD-607-A: Commercial Building Grounding (Earthing) and

Bonding Requirements for Telecommunications• ANSI/TIA/EIA-568-1: Commercial Building Telecommunications Cabling

Standard Part 1: General Requirements• ANSI/TIA/EIA-568-2: Commercial Building Telecommunications Cabling

Standard Part 2: Balanced Twisted-Pair Cabling Components• ANSI/TIA/EIA-568-3: Optical Fiber Cabling Components Standard• ISO/IEC 11801• Palestinian Authority standards

3.1.1.2 Standards for electrical installationsAll the PCP electrical installations follow the following standards.The design manufacture installation and testing of all materials and equipment shall comply with the latest Local Authorities Specifications. Where no particular item is not specified by Local Authorities Specifications, relevant recommendation of the International Electrotechnical Commission (I.E.C.) and if this is not available then with the latest relevant British Standard Specification (B.S.S.) or other approved National Standards. Specifically the following standards/regulations/codes shall be acceptable:

• Palestinian Authority standards• Municipality regulations• IEC standards• ISO standards• International Commission for Conformity Certification of Electrical

Equipment (CEE)• The latest relevant recommendations of the committee ‘Consultant

International Telephone and Telegraph (CCITT)• Regulations and instructions from the Civil Defense Department

3.1.1.2.1 Conductors

The conductors shall be high conductivity copper, stranded for power cables and solid for control cables' according to the type of insulation, the copper conductors will be plain or tinned.Cables shall be installed on cable trays or on building structure as indicated on



the Drawings. They shall be neatly fixed in straight lines. On cable trays, cables shall be fixed by cable clips or ties while, on building structure cable cleats shall be used. The spacing of cable supports shall be as indicated in I.E.E. Regulations table B.2M. The minimum radius of bends for cables shall be in accordance with table B.1M of the regulations with bends made neatly and uniformly.Where single core cables are used for feeders, care shall be taken to ensure equal division of current among cables which shall be arranged in trefoil formation.Proper cable glands of non ferrous material shall be used for cable entries into distribution boards and equipment.Each end of each cable shall be provided with identification label lettered with feeder or circuit designation to the Supervisor's instructions. The labels shall be permanently fixed in distribution boards, terminal boxes, isolators, etc. and shall be made of durable material ensuring permanent legibility.Unless otherwise specified, cables wires and terminations shall comply with the following standards as appropriate :

3.1.1.2.1.1 Cable and Wires

BS 1442 Galvanized Mild Steel wire for armouring cables.BS 2897 Aluminium strip armour for cables.BS 6234 Polyethene insulation and sheath for cablesBS 6360+IEC 228 Copper conduct for cablesBS 6746+IEC 540 PVC Insulation & Sheath for cables.BS 6346+IEC 502 PVC Insulated CablesBS 5467+IEC 502 Armoured CablesBS 6004+IEC 227 PVC Insulated Cables for Power and LightingBS 6500+IEC 227 Insulated Flexible CordsBS 6207+IEC 245 Mineral Insulated Cables

3.1.1.2.1.2 Cable Termination

BS 4579 Performance of Mechanical and Compression Joints for CablesBS 6081 Termination of MICC CablesBS 6121 Mechanical Cable Glands.All cable terminations shall comply with the concerned local authorities requirements.

3.1.1.3 Other standards and requirements

• ANSI/TIA/EIA-606: Administration Standard for Commercial Telecommunications Infrastructure

• All material must be UL certified• This document does not exclude any part of these standards. It is the

responsibility of the Contractor to be familiar and conversant with the most recent editions of these standards in their entirety.



3.2 Sockets types definition

• CAT6: female RJ45, 8P8C IEC 60603, compatible with RJ11. • TIA/EIA-568-B.2-1• All panels and outlets shall use standard module with tool free

connection.• Labeled wiring.

• Power: electrical socket without UPS, Type H: SI 32 (IS16A-R)• UPS: electrical socket with UPS backup, IEC 60320 C13 or CEE 7/4 type F• TV: RG-6 female F connector• Radio: N-type female connector

3.3 Mounting heights

Unless otherwise stated on the drawings, the following shall be mounting heights of equipment centre lines above finished floor level;

• Perimeter trunk 600mm• Power Socket outlet 600mm• Data Outlet 600mm• TV/Radio antenna socket 600mm

Where accessories with varying mounting heights (e.g. light switch and socket outlet) are shown in approximately the same location, their centre lines shall be aligned vertically. Any discrepancy found between these mounting heights and other disciplines e.g. architectural drawings, shall be submitted for approval.

3.4 Electrical supporting devices

3.4.1 General

3.4.1.1 Voltage

All single phase devices shall be rated for 240V / 50 Hz and all three phase devices shall be rated for 415V / 50Hz.

3.4.1.2 Description

Provide wiring devices including switches receptacles, switchfuse units, junction boxes, control devices etc. as specified, indicated on drawings and as required for proper functioning.

3.4.1.3 Reference standards

Lighting Switches BS 3676 part 1/1989 & CENELECPREN60669-1Fuse Connecting unit BS 136220A DP Switch BS 3676 part1Flux Outlets BS 5733/1995Dimmer light Switches IEC 669-2-1,BSEN 50082-1Cooker Control Unit BS 4177/1992Metal Clad Boxes BS 5733Weather Proof Socket outlets BS 1363/1984



Sentry Socket outlet BS 7288/199Where no reference standard is mentioned the applicable BS standard shall apply.

3.4.2 Sockets

Sockets shall be 250V three pin sockets, type Type H, SI 32, IS16A-RUPS socket outlets shall be the IEC 60320 C13 or CEE 7/4 type F.Three phase sockets shall be of type IEC 60309 (3P+N+E) 5 pin design (3 phase + neutral + earth) as per the concerned local authorities specifications. The current rating shall be as shown on drawings. Weatherproof sockets outlets shall have the weather tightness as required at the location and shall comply with the concerned local authorities specifications.Terminal shall be grouped in-line with terminal screws backed out and terminals shall be marked.

3.4.3 Junction boxes

The junction boxes shall be with current rating as shown on drawings or indicated in schedules. Switch controlling Junction Box shall be provided with neon lamp. Floor mounted J.B. shall be of water tight design as required by the particular equipment being fed through the J.B.Indoor Wall mounted Junction box and its associated switch shall be white moulded & provided with flex outlet.

3.4.4 Switches

Switches shall be of minimum 10A ratings unless higher ratings are shown on drawings.Wiring terminals shall be of the screw type or solder-less pressure type having suitable conductor release arrangement. Where two or more switches are located in the same position, they shall be installed in one box and covered by a multi-gang cover plate.Weatherproof switches shall have weather tightness as specified per location. Weatherproof switches shall be connected to separate breakers / fuses and not in parallel or in series with normal switches.

3.4.5 Mounting boxes

Mounting boxes shall be 1 gang or 2 gang as specified and shall be manufactured from hot dip galvanized steel. Each box shall have brass earth terminal fitted in base and shall include ample knockouts and adjustable lugs.

3.4.6 Pull boxes /junction boxes

Fix pull boxes at minimum 10 Meter spacing and to limit the number of bends in conduit to not more than two 90° bends.Locate junction boxes as inconspicuously as possible but accessible after work is completed.



3.5 Work areas

A work area is where horizontal cabling ends with a purpose of connecting to telecommunications equipment.There are following types of work areas, but there can be also different work areas defined if the project requires.

3.5.1.1 Office

A typical office work area is defined as a set of:Sockets:

• two CAT6• two power• two UPS

A typical office work area covers an area of approximately 10 m2. Telecommunications equipment is connected to the work area sockets by using patch cables. Patch cables used in a work area must not be longer than 3 m. Work area sockets must be placed so that they are within 3 meters of any possible workstation or equipment location. Distance between two work areas must not be longer than 6 m.The office work area sockets must be at a specified height from floor measured from the lowest edge of the faceplate, unless otherwise agreed. The sockets must be at the same level in the whole installation site, unless written approval has been obtained for the specific cases. The exact height and position of the sockets will be determined separately in each site. Office work area sockets can also be located inside the perimeter raceway trunk, in case modular trunks are used.

3.5.1.2 Access control

Access control area is where physical access control equipment is located to control access doors, elevators, gates or other equipment.Sockets:

• single CAT6

3.5.1.3 Video surveillance

Video surveillance area is where a camera is located.Sockets:

3.5.1.3.1 Indoors

• single CAT6

3.5.1.3.2 Outdoors

• single CAT6, with IP67 protection (can be either a IP67 socket or a IP67 box containing standard socket)

3.5.1.4 TV equipment

This is where a Television Set is installed.



Sockets:• single CAT6• single TV• two power

3.5.1.5 Two-way radio equipment

This is where two-way radio equipment is installed.Sockets:

• single radio• one UPS

3.6 Types of cables

All cable runs shall be continuous, no joints will be permitted.There is no dedicated telephone cable system.

3.6.1.1 Telecommunications

3.6.1.1.1 Cable – computer network

3.6.1.1.1.1 General

Cable type: CAT6, certified TIA/EIA 568-B.2-1 compliant Category 6 copper cable. Shielding: FTP, STP or SSTP allowed.Colour: Grey RAL 7035 or similarUL 1581 VW-1 fire safety certification is required.Patch cables must also be certified to TIA/EIA 568-B.2-1.

3.6.1.1.1.2 Installation

TIA/EIA 568-B.2-1 standard must be followed in the installation.Where cables are supported on cable tray or cable ladders they shall be fixed to the cable tray using suitable approved straps of clips. Cable shall not be run exposed to direct sunlight. Covers or other equivalent means shall be provided for protection.Minimum bend radius of the cable must be according to the manufacturers recommendations, not less than 50mm and not less than 5 times the overall diameter of the cable whichever is more.Where cables are laid on cable trays or ladder in mechanical or electrical technical rooms or prone to damage elsewhere on the project, they shall be mechanically protected by a cover to a height not less than 2 m from the finished floor level.When installing cables, care shall be taken to ensure that electrolytic action does not take place between the cable and any other material.

3.6.1.1.1.2.1 termination

Cable termination according to ANSI/TIA/EIA-568-B. Pair untwist shall not exceed 13 mm. Within a single telecommunications space, the cables are



terminated sequentially to the single group of patch panels. No different groups of patch panels.

3.6.1.1.1.2.2 length

ANSI/TIA-568-B.2-1 specifies the total maximum distance of the channel between network interfaces including patch cables to be 100 m. Therefore, a horizontal cable shall not exceed 90 m in length.ANSI/TIA-568-B.2-1 describes worst case modeling using a 15 m link. Therefore a horizontal cable shall not be shorter than 15 m in length.

3.6.1.1.1.2.3 ties and bundling

Cables shall be secured in bundles of no more than 24. Nylon/plastic tie wraps cannot be used for securing bundles of CAT6 cables. Velcro ties or wraps must be used.Ties shall be spaced at not grater than 600 mm intervals along each cable, and within 100 mm of end bend or set.In a vertical pathway, cables must be tied in bundles at approximately 300 mm, and secured to the tray at no more than 600 mm.

3.6.1.1.2 Cable – TV

Cable type: RG-6 Braided Coaxial CableMinimum bend radius of the cable must be according to the manufacturers recommendations, but not less than 50mm at any point.

3.6.1.1.2.1 termination

The cable must be terminated with female F connector in the work area.

3.6.1.1.2.2 length

A horizontal cable shall not exceed 90 m in length.

3.6.1.1.3 Cable – Stationary two-way radio equipment

Cable type: CNT400/RG213 50 Ohm Braided Coaxial CableMinimum bend radius of the cable must be according to the manufacturers recommendations, but not less than 50mm at any point; 205mm with repeated bends. Bend angle of the cable must not be sharper than 100 degrees at any point.

3.6.1.1.3.1 termination

The cable must be terminated with female N-type connector in the work area.

3.6.1.1.3.2 length

A antenna cable shall not exceed 90 m in length.



3.6.1.2 Electrical

3.6.1.2.1 General

All cables shall be designed for operation in systems where continuity of supply is the first consideration. They shall also be satisfactory in operation under the variations of current, voltage and frequency as may be met under fault and surge conditions on the system.All materials shall be of the best quality and of the class most suitable for working under the particular condition of the systems. They must be capable of withstanding the normal variations of temperature and service conditions without disturbance or deterioration.Cables and wires shall conform to the international standards and to the concerned local authorities specifications.The requirements of this section shall apply to all multi-core and single core cables, referred to on the drawings and elsewhere within this Specification.The types of cables shall have copper conductors and comprise the following:

1. Single core PVC insulated wires and cables.2. Flexible multi-core cables.3. XLPE/SWA/PVC cables or XLPE/PVC cables.

3.6.1.2.2 Products

3.6.1.2.2.1 Single core PVC insulated cables

Single core cables for lighting and small power shall be of high conductivity copper stranded wire insulated with PVC 850C, minimum.Cables shall comply with BS 6004 and shall be of 450/750V grade.Cables shall be colored in accordance with section 514 of the IEE Wiring Regulations, 16th Edition, and BS 3858.

3.6.1.2.2.2 Flexible cables

All flexible cables used for pendant lighting fittings or for final connections to fixed or portable equipment shall be of 300/500 volt grade and comply with BS 6500.Flexible cables shall be of annealed copper conductors insulated with heat resisting PVC, sheathed with heat resisting PVC and shall be of circular construction.Cable cores shall be colored in accordance with section 514 of the IEE Wiring Regulations, 16th Edition, and BS 3858.

3.6.1.2.2.3 Cross-linked polyethylene (XLPE) insulated unarmoured or steel wire armored and PVC sheathed cables

All low voltage multi-core distribution cables shall be 600/1000 volt grade cross-linked polyethylene (XLPE) insulated copper conductor, unarmored or steel wire armored and PVC sheathed cables complying with BS 5467.Cable conductors shall be of high conductivity copper wire insulated with cross-linked polyethylene. The armoring shall consist of a single layer of galvanized



steel wire and the cable shall be sheathed overall with PVC.Steel wire cable armoring shall be securely bonded to earth at each termination by means of an adequately sized metallic bond which shall be as short and straight as it is practicable. Cable cores shall be colored in accordance with section 514 of the IEE Wiring Regulations, 16th Editions, and BS 3858.Joints shall not be allowed in any cable unless approved by the Supervisor prior to execution.

3.6.1.2.3 Inspection

The Contractor shall examine the areas and conditions under which the cables are to be installed and correct any unsatisfactory conditions detrimental to the proper and timely completion of the work. The Contractor shall not proceed with the work until all unsatisfactory conditions have been corrected in a manner acceptable to the Supervisor.

3.6.1.2.4 Sub-circuit wiring - lighting

Lighting installation wiring will take the following forms:1. Single core PVC insulated cables in trunking/conduit for internal wiring.2. Multi-core XLPE/PVC insulated cables in cable tray, ladder or conduit for

internal wiring.3. Multi-core XLPE/SWA/PVC in conduit, duct banks or direct buried for

external wiring.The types of lighting luminaries required are detailed on the drawings, and the types of lighting installations and accessories are detailed elsewhere in this specification and on the drawings.No conductor smaller than 1.5 sq mm shall be used.All lighting circuit wiring shall be carried out using the "loop-in" system, where applicable.Each lighting circuit shall be wired as shown on the drawings and in accordance with this Specification.Each lighting circuit shall have a separate circuit protective conductor throughout to each light and switch point.Where a lighting circuit is to be installed in trunking or conduit together with any other circuit(s) deviating from drawings, the circuit conductor must be dreaded for grouping in accordance with IEE Wiring Regulations, 16th Edition. This will normally result in the need to increase the conductor sizes as shown in the schedule.Normal and emergency circuit wiring or cables shall run in separate conduits or in separate compartments of metal trunking or on separate cable tray/ladder in accordance with IEE wiring regulations, 16th edition.

3.6.1.2.5 Sub-circuit wiring -small power

Small power installation wiring will take the following forms:1. Single core PVC insulated cables in trunking/conduit for internal wiring.2. Multi-core XLPE/PVC insulated cables in cable tray, ladder or conduit for

internal wiring.



3. Multi-core XLPE/SWA/PVC in conduit, duct banks or direct buried for external wiring.

The types of small power installations and accessories required are detailed elsewhere in this Specification and on the drawings.The small power installations shall be wired using the radial system as described on the drawings.No conductor smaller than 2.5 sq mm shall be used.Each small power circuit shall have a separate circuit protective conductor throughout to each outlet.Where a small power circuit it to be installed in trunking or conduit together with any other circuit(s), deviating from drawings, the circuit conductors must be dreaded for grouping in accordance with IEE Wiring Regulation, 16th Edition. This will normally result in the need to increase the conductor sizes as shown on the drawings.Normal and emergency circuit wiring or cables shall run in separate conduits or in separate compartments of metal trunking or on separate cable tray/ladder in accordance with IEE wiring regulations, 16th edition.

3.6.1.2.6 Main-circuit wiring - power (single and 3 phase)

Power installation wiring will take the form of one of the following:1. Single core PVC insulated cables in trunking/conduit.2. Multi-core or single core XLPE/PVC cables in cable tray, ladder or conduit

for internal wiring.3. Multi-core XLPE/SWA/PVC in conduit, duct bank or direct buried for

external wiring.The types of power installations required for this project are detailed elsewhere in this Specification and on the drawings.Power installations will generally be wired on a single circuit basis as described on the drawings and will serve fixed items of equipment.No conductor small than 2.5 sq. mm shall be used.Each power circuit shall have a separate circuit protective conductor.When a power circuit is to be installed in trunking or conduit together with any other circuit(s) deviating from drawings, the circuit conductors must be dreaded for grouping in accordance with IEE Wiring Regulations, 16th Edition. This will normally result in the need to increase the conductor sizes.Normal and emergency circuit wiring or cables shall run in separate conduits or in separate compartments of metal trunking or on separate cable tray/ladder in accordance with IEE wiring regulations, 16th edition.

3.6.1.2.7 Flexible cable installation

Flexible cables shall not be concealed in any part of the installation.Where flexible cables are subject to heat they shall be constructed containing a minimum of three cores.All flexible cables are to be of circular construction containing a minimum of three cores.Where portable appliances exceed 200 watt rating, the flexible cable shall not be smaller than 32/0.20 sq. mm.



Flexible cables exceeding 1.8 m in length shall not be allowed, with pride approval of the Supervisor hard wiring shall be taken to within 1.8 m of all equipment or apparatus to be supplied with prior approval of the Supervisor.

3.6.1.2.8 Internal cable installation

Where cables enclosed in conduits are run vertically in excess of 5 m the cables shall be clamped after passing out of the conduit, so as to relieve strain on the cables, using suitable approved clamps.Where cables are run in trunking the cables of each circuit or groups of circuits shall be clipped together using nylon straps or other suitable straps or clips. Vertical runs of trunking exceeding 5 m shall be supplied with pin racks to relieve the strain on cables.Suitable precautions shall be taken during multiple circuit wiring follows a common route then the wiring shall be installed in trunking rather than multiple conduits.To ease future maintenance and modifications, where multiple circuit wiring follows a common route then the wiring shall be installed in trunking rather than multiple conduits.All cable runs shall be continuous, no joints will be permitted.Saddle and clips used for fixing cables shall be from the same manufacturer as the cable which they are being used to fix and shall be constructed of the same material as that of the cable sheath with an overall covering of PVC to the same color as that of the PVC covering of the cable. All saddles and clips shall be secured using brass round head screws. Where cables are supported on cable tray or cable ladders they shall be fixed to the cable tray using suitable approved straps of clips. Ties shall be spaced at not grater than 600 mm intervals along each cable, and within 100 mm of end bend or set.Cable shall not be run exposed to direct sunlight. Covers or other equivalent means shall be provided for protection.Bends in cables shall not be of a smaller radius recommended by manufacturer but not less than twice the overall diameter of the cable whichever is more.Each gland shall be from the same manufacturer as the cable on which it is used and shall be stamped describing the size and number of conductors. PVC shrouds shall be used to protect every gland.Where cables are laid on cable trays or ladder in mechanical or electrical technical rooms or prone to damage elsewhere on the project, they shall be mechanically protected by a cover to a height not less than 2 m from the finished floor level.When installing cables, care shall be taken to ensure that electrolytic action does not take place between the cable and any other material.Power and lighting cables can be installed on one cable tray, and low current system cables can be installed on another cable tray with fire alarm cables separated by suitable mechanical separators if required.

3.6.1.2.9 External cable installation

No work shall commence until the Contractor has investigated the site satisfactorily, and ascertained that the area is free drains or other underground



services.Unless otherwise indicated, excavations within 600 mm of existing services shall be by hand digging. All services uncovered, whether expected or not, shall be reported immediately to the Supervisor; they shall be supported by slings or other suitable means and protected. Any damage to services, however minor, shall be reported immediately to the Supervisor; no repairs or replacement shall be done unless the Supervisor gives his approval.When cable trenches are opened all cables shall be laid as quickly as possible. The Supervisor approval shall be obtained before a trench is backfill, generally backfilling shall be commenced within 24 hours of cable lying and the work completed speedily.Excavations shall be kept free of water and protected against damage or collapse. The safety of persons and the protection of structures, buildings, roads and services from damage shall be ensured.Before cables are laid the bottom of the trench shall be graded evenly, cleaned of loose stones and then covered for the full width of the trench with a 150 mm layer of earth which has passed through a sieve with a maximum mesh of 12 mm or with sieved sand. Where the level of the trench bottom has to change the slope shall not be greater than 1 in 12.After cables have been laid a further layer of earth or sieved sand shall be added over the full width of the trench and tamped to provide finally not less than 50 mm cover over the cables. The earth shall have passed through a sieve with a maximum mesh of 12 mm.Trenches shall be backfield in layers and each layer shall be rammed. The first two layers shall be 100 mm deep and rammed by hand; the ramming may be used. Warning tapes and covers shall be provided.Warning tapes shall be of polythene not less than 150 mm wide and 0.1 mm thick. They shall be yellow in color and bear the continuously repeated legend "CAUTION ELECTRIC CABLE BELOW" or similar in English and Arabic, in black letters not less than 30 mm high.Warning covers shall be provided, and comply with regulation and codes of practice, for M.V. cables. Covers shall be laid directly on tamped sieved earth or sand that covers the cables.Cables laid in trenches shall cross other cables only at junctions; clearances between the cables shall be maintained at cross over. Cables shall not be laid one above the other except where indicated.If more than one cable is to be drawn in a duct, the cables shall be bunched together and pulled in one operation, wherever possible.Where cables run under roadways, concrete or paved areas, they shall be installed in PVC ducts, encased in concrete. The ducts shall extend for a minimum distance of 1 m on each side of each roadway, concrete or paved area wherever possible and at least one spare duct shall always be provided.Where cables enter ducts beneath ground to buildings, these ducts shall be sealed to prevent the ingress of water by means of sealing fittings which will be filled with sealing compound. At least one spare duct shall be installed at each building entry point.Details and routes of external cables are shown on the drawings.Cables shall be installed to the requirements of the IEE Wiring Regulations,



16th Edition and all current amendments. Cables shall only be terminated using the correct size and type of gland with earth tag and shroud from the same manufacturer as the cable. All gland shall be dustproof and for external applications the glands shall be fully weatherproof.Cable armoring shall be bonded to earth at each termination by means of a green/yellow Cu/PVC earth conductor, sized in accordance with chapter 54 of IEE Wiring Regulations 16th Editions, connecting the cable gland earth tag to the local earth terminal. The apparatus gland plate shall be cleaned to bare metal around the cable gland earth tag bolted connection to ensure a sound electrical connection.Where cables pass through walls or floors, they shall be protected by PVC or mild steel sleeves cast in to the building fabric. If the walls or floors are fire divisions, then the sleeves shall be fire stopped after installation of the Cables(s) to the same rating as the walls or floors through which they pass.Before any tradesman is allowed to terminate an armored cable on the permanent works, he shall make a demonstration termination in the presence of the Supervisor and obtain the approval of the Supervisor.Where cables pass through ducts or sleeves entering buildings, the Contractor shall seal the ends of the ducts or sleeves using a suitable approved stopper after installation of cable.

3.6.1.2.10 Jointing and terminating cables

The Supervisor shall be informed whenever cables are to be jointed.The Supervisor shall be given evidence that the joint or termination manufacturer has stated that materials to be employed are suitable for the type of cable to be jointed or terminated.A cable shall not be cut until the jointing or terminating commences and the work shall proceed continuously until it is completed. All necessary precautions shall be taken to prevent damage and ingress of moisture and impurities, cables ends shall be free from moisture before jointing commences. Where circumstances prevent completion the cable ends shall be sealed.The Contractor shall employ for this work staff who are fully qualified and competent for the types of joints and terminations to be made.For joints in armored cables, bonding conductors shall be connected across the armoring. A split ferrule shall be place under the armoring to prevent deformation of the cable by the clamp.At terminations, armoring and metal sheaths shall be connected directly to the external earthing terminal of the equipment by a bonding conductor. For L.V. cables the bonding conductor shall have cross sectional area in accordance with regulations mentioned elsewhere in this specification and for M.V. cables it shall be as indicated.At terminations, cable tails shall be formed by separating and bringing out the cores. Each tail shall be long enough to be connected to the terminals of the equipment.Core identification at terminations shall be by colored or numbered plastic stretch or shrink ferrules.



Continuity of spare cores shall be maintained at joints, and at terminations the cores shall be connected to spare terminals.Compression connectors and associated dies for the compression tool shall be the correct type and size. The tool shall be so designed that the correct compression must be applied before it can be released.Tools for manipulation and termination of cables shall be of a design approved by the cable manufacturer. Corrugation of the metal sheath or damage to outer coverings will not be accepted. A wood block or wooden faced tool shall be used to finally dress the cable into position.Repairs to a cable sheath, regardless of the extent of the damage, will not be accepted, straight through joints only are permitted.Terminations and joints shall be made in accordance with the manufacturer's instructions. Only clean, dry plastic filling compound shall be used.Marking of cables shall comply with relevant regulation and codes of practice mentioned elsewhere in this specification and requirements of the Section.All H.V. electrical cable 13.8 kv shall be terminated, spliced with pre-molded, manufactured apparatus elbows, splices, and they shall be installed in strict accordance with manufacturer's recommendation. All parts shall be of one manufacturer to assure inter-changeability. Taping or epoxy-formed terminations or other field applied methods shall not be permitted except with written approval.All pre-molded rubber parts shall be 100% production tested at the factory with industry standard applied potential and corona extinction tests. The factory shall certify in writing that these tests have been performed. No soldering shall be permitted on drain wires or shielding tapes except with written approval of the Supervisor.All electrical cables entering the high voltage compartments of electrical equipment shall be terminated by means of "dead front" equipment wherever possible.

3.6.1.2.11 Sleeves, tapes and sealing compound

Sleeves shall be of the shrink type, applied cold by a mechanical device or by the use of heat. They shall provide a sufficient thickness of insulation to suit the particular application.Insulation tape used in joints and terminations shall be compatible with, and have a temperature rating and insulating property not less than the cable insulation. They shall comply in general with the regulations and standards mentioned elsewhere.

3.7 Telecommunications distribution systems

3.7.1 Horizontal distribution systems

Horizontal pathways are facilities used in the installation of horizontal cabling to provide the work area with the following services:

• voice• data



• building control, access control• alarm and sensors• video• audio• RF

3.7.1.1 Sizing

Size of the pathway must always be chosen so that the maximum fill ratio is 60% to accommodate possible growth in the future. It must be possible to service, add or replace individual cables. Easy access using special maintenance boxes, holes or covers without damaging the inner decoration.

3.7.1.2 Topology

For telecommunications installations, horizontal distribution will employ star topology, radiating from the equipment room. Hierarchical star topology is used for installations with more than one telecommunications room.

3.7.1.3 Location

The horizontal distribution pathway must be chosen so that it will provide• suitable physical and EMI protection for the cables inside• aesthetic visible appearance

3.7.1.4 Electrical segregation

Safety:Electrical safety code must be followed in case of telecommunications and power cable co-installation.

Electromagnetic immunity:There must be a minimum of 50 mm separation between power and telecommunications cables in perimeter raceways and other areas where the power and telecommunications cables have to be installed close to each other due to design constraints. The minimum separation distance applies at all points in the trunking including locations where cables are terminated.

There must be a minimum of 300 mm separation between power and telecommunications cables in backbone and horizontal raceways.

Telecommunications cables shall not pass through areas with high EM radiation.

Telecommunications cables shall be installed minimum 80 cm away from parallel high voltage transmission lines.

3.8 Pathways and raceways

3.8.1 General

Raceways shall include all bus ducts, cable ladders, trays and cable trunking



with all associated accessories, supports and fixings used for the distribution cables in the buildings.Raceways shall be as indicated on the drawings or specifications. Specifications of local authorities must be followed.The requirements of this section shall apply to all electrical raceways referred to on the drawings and elsewhere within this specification.The types of raceways required shall comprise the following:

1. Cable Trays2. Cable Ladders3. Cable Trunkings (Metal)4. Cable Trunkings (PVC)5. Underground Ducts6. Aerial Pathways7. Metal Conduits8. Underfloor Ducts9. Access Floor10. Flexible Conduits11. PVC Conduits12. EMT Conduits13. Ceiling Pathways

3.8.2 Size selection

The size of the raceways shall be selected according to local authorities regulations taking into consideration required "2D" spacing between cables (Where D is the cable diameter of the larger cable or the space factor as applicable in case of cable trunking.)

3.8.3 Backbone and horizontal raceways

Connections between floors and equipment rooms: 20% extra spare conduits shall be installed, minimum one empty conduit. Elevator shaft must not be used for cable pathway.All telecommunications-related inter-building connections and pathways shall follow the ANSI/TIA/EIA-569-A and ANSI/TIA/EIA-758 standards. Inter-building pathways are considered to be a component of the entrance facility.

3.8.3.1 Cable trays

All cable trays shall be of heavy duty perforated type with return flange.All cable trays shall be manufactured from hot-dip zinc coated steel to BS 2989 with a standard heavy duty galvanizing coating of 350g/m2 and Z2 bending grade.All bends, tees, cross units and angles shall be of the same specification as that of the cable tray finish and shall be standard products from the same manufacturer as the cable tray. Site fabrication shall not be permitted.Cable trays and accessories shall be of a thickness of not less than:

• 1.5mm up to 305mm width.• 2.0mm above 305mm width.



All fixing brackets, nuts and bolts shall be finished by hot dip galvanizing.Tinned copper earth continuity straps shall be provided at every joint.Where cable tray crosses building expansion joints, the tray shall be installed as shown in the typical drawing details.Cable trays shall be assembled complete with couplers, bends, tees, risers, reducers and all other accessories as required and these accessories shall be of the same material, thickness and finish as the trays. Manufacturer's standard accessories shall be used and site fabrication shall only be allowed where special sections are required subject to the approval of the Supervisor.Mushroom head steel roofing bolts and nuts shall be used to fix adjacent sections of cable trays and/or accessories. Holes cut in trays for passage of cables shall be provided with grommets Cable trays shall be cut only along a line of plain metal and not through perforations. All cut edges of trays shall be prepared with burrs and sharp edges removed prior to installation and any cutting and/or damage made good with rust proofing agent and zinc rich epoxy paint.Space allocation: 650mm2 cross-sectional tray area for each work area. The cable trays and wireways maximum fill ratio allowed is 50%.Cable trays shall not sag more than 3 degrees between supportsCable trays shall be supported at not more than 100 Cms by galvanized wall brackets/supports or by stainless steel hanger rods.

3.8.3.1.1 Cable tray supports and racks

Cable trays shall be fixed by support channels and hanger rods or by cantilever brackets fixed to walls or columns. Fixings shall be disposed at regular intervals not exceeding 1.0m. Joints shall be positioned as close as practicable to the tray fixing or support. Mid-span joints shall be avoided. All screw bolts and nuts used for fixing shall be zinc plated. All the supporting angles, brackets, anchors, etc. shall be of hot dip galvanized. A minimum clear space of 25mm shall remain at the wall side.Weld gun stud fixing will be allowed subject to the approval in writing of the Supervisor. Drilling of building structural steelwork shall not be allowed except in special circumstances and then only with prior permission in writing by the Supervisor.Hanger rods shall be galvanized steel, minimum 10mm in diameter, one piece continuously threaded.

3.8.3.1.2 Installation

Where practical cable tray shall be run horizontally and flat or vertically and shall be supported at distances not exceeding 1.5 m to the building structure using mild steel brackets. These brackets shall be secured to the building structure using expanded bolts and washers or built into the building structure during construction.Where cable tray is suspended, 2 No. drop rods shall be used at each suspension point to an angle iron or channel support to which the cable tray is bolted. The spacing of suspension points shall be determined in accordance with the manufacturer's structural information such that undue stress or



deflection does not occur.Where cable tray is cut, the open ends shall be painted using an oxide undercoat and an aluminium top coat. Where the finish is PVC a top coat of liquid PVC solution shall be applied after the completion of the cable tray installation.Cable trays run parallel with walls shall not be mounted closer than 75mm to the wall.All cables shall be secured to the cable tray at distances in accordance with table 4A of the IEE Wiring Regulations, 16th Edition, using suitable clips.Bare copper cables shall not be run on cable tray.Earth continuity shall be ensured by means of tinned copper earth straps bolted across each joint. Flexible braided straps shall be used for expansion joints.

3.8.3.2 Cable ladders

All cable ladders shall be heavy gauge H-type made from 2mm mild steel with 3mm coupling plates, manufactured from hot-dip galvanized sheet steel to BS 2989;G350 coating weight (350g/m2) and Z2 bending grade.Side channels shall be strengthened by reinforcing inserts or other means to increase torsional rigidity. Rungs shall be slotted type. Cable ladders shall be hot-dip galvanized and shall be complete with coupling pieces, bends, tees, reducers, risers, drop-outs, intersections and all other accessories as required and these shall be of the same material, thickness and finish as the ladders.Ladder system supports shall be determined in accordance with the manufacturer's structural information to ensure undue stress or bending does not occur.In areas subject to corrosive atmosphere, eg. chlorine, the ladders shall have a PVC finish.Tinned copper earth straps shall be provided at every joint.


Where practical, cable ladders shall be run horizontally and flat or vertically and shall be supported at distances not exceeding 1.5 m to the building structure using mild steel brackets. These brackets shall be secured to the building structure using expanded bolts and washers or built into the building structures during construction.Where cable ladder is suspended, 2 No. drop rods shall be used at each suspension point to an angle iron or channel support to which the cable ladder is bolted. The spacing of suspension points shall be determined in accordance with the manufacturer's structural information such that undue stress of defection does not occur.Where cable ladder is cut, the open ends shall be painted using an oxide undercoat and an aluminium top coat. Where the finish is PVC, a top coat of liquid PVC solution shall be applied after the completion of the cable ladder installation.Cable ladders run parallel with walls shall not be mounted closer than 75 mm



to the wall.All cables shall be secured to the cable ladder with suitable clips at distances in accordance with chapters 521-03 and 522-08 of the IEE Wiring Regulations, 16th Edition, a maximum number of 4 cables may be secured by one clip.Bare copper cables shall not be run on cable ladder.Earth continuity shall be ensured by means of tinned copper earth straps bolted across each joint. Flexible braided straps shall be used for expansion joints.

3.8.3.3 Cable trunking

Cable trunking shall be used wherever possible to replace multiple conduit runs as shown on drawing and as approved by Supervisor.Where trunking is used to carry various services it shall be sub-divided into separate compartments for power, telecommunications and auxiliary services.The trunking system shall be installed using only components specified by, and in accordance with the installation method statements provided by, the supplier of the trunking system.

3.8.3.3.1 Cable trunking (metal)

Metal cable trunking shall comply with BS 4678 Part 1: Class 3 and shall be manufactured from galvanized steel sheet to BS 2989.Only purpose-made fittings, connectors, covers and accessories by the same manufacturer as the trunking shall be used and finished in hot dipped galvanized steel to BS 2989. Site fabrication shall not be permitted.Tinned copper earth straps shall be provided at every joint.Covers shall be of the overlapping type and secured to the trunking by either an approved clip or screws.In areas subject to corrosive atmospheres, e.g. chlorine, all trunking shall be painted with chlorinated rubber paint.The minimum thickness of metal employed in the construction of this trunking shall be 1.2mm and of the following thickness for various sizes :

• 1.2mm thick - up to and including 100mm x 100mm• 1.6mm thick - up to and including 150mm x 150mm• 2.0mm thick - up to and including 230mm x 230mm

Adjoining sections of trunking shall butt tightly and shall be jointed by means of an internal fishplate connector attached by not less than eight cadmium plated steel cup-headed bolts and hexagon nuts, passing through clearance holes. Two pairs of bolts on either side of the joint shall be connected by tinned copper braids with split soldering washers under the nuts to provide electrical continuity across the joints. The trunking shall be mechanically and electrically continuous throughout.

3.8.3.3.2 Cable trunking (PVC)

Heavy Duty U.P.V.C. trunking with clip on lid (all insulated) shall be used wherever possible to replace multiple conduit runs. Where applicable, trunking shall comply with the requirements contained in BS 4678 Part 4. Any non-standard trunking accessories shall be fabricated by the manufacturer, no site



fabrication shall be allowed.In order to facilitate interchangeability and to eliminate problems of differential manufacturing tolerances, it is essential that all PVC cable trunking and appropriate accessories covered by this specification shall be obtained from the same manufacturer.


Cable trunking shall be fixed securely to the building structure at intervals not exceeding 1.5 m.Where vertical runs of trunking exceed 3 m in length, pin racks shall be fitted by the Contractor.Spacing or fill factors shall be applied to all cable trunking in accordance with chapter 522-08 of the IEE Wiring Regulations, 16th Edition.For metal trunking installations, earth continuity shall be ensured by means of tinned copper earth straps bolted across each joint. Flexible braided straps shall be used for expansion joints.Metal trunking cut during installation shall have the cut ends painted with an oxide undercoat and an aluminium top coat.Where metal trunking is installed in areas subject to corrosive atmospheres, the complete trunking installation shall be painted with a chlorinated rubber paint after the installation is complete.Expansion joints with gaps shall be incorporated in all PVC trunking runs in excess of 6 metres in length. External couplings shall have elongated slots and fixing holes shall be drilled oversize to give freedom of linear movement. Internal couplings shall be securely fixed at one end by use of thiscotrophic adhesive leaving the other end free for linear movement. Bare copper or aluminium cables shall not be run in metal trunking.

3.8.3.3.4 Installation of telecommunications cables

Telecommunications cables shall only be installed within the section of the trunking system specified by the supplier of the trunking system to house such cables.The quantity of cables installed shall not exceed the maximum number specified by the supplier of the trunking system as appropriate for the diameter of cables used.Fittings that are required to maintain segregation between telecommunications and mains power cabling shall be as supplied, and used in accordance with the installation method statements provided, by the supplier of the trunking system.

3.8.3.3.5 Installation of mains power cables

Installation method statements shall define the maximum quantity of electrical circuits that may be installed in order that the separation provided by the design of the trunking provides the required electromagnetic immunity for the telecommunications cabling (as defined in section “Electrical segregation”).Mains power cables shall only be installed within the section of the trunking system specified by the supplier of the trunking system to house such cables.



Fittings that are required to maintain segregation between telecommunications and mains power cabling shall be as supplied, and used in accordance with the installation method statements provided, by the supplier of the trunking system.

3.8.3.4 Outdoor cable trays

All the requirements of the section “Cable trays” apply.Assemble cable trays sunshaded cable trays for outdoor complete with couplers, bends, tees, risers, reducers and all other accessories and of the same material, thickness and finish as the trays. Use manufacturer's standard accessories. Site fabrication will be allowed only where special sections are required and subject to the approval of the Supervisor.All cable trays exposed to sun shall be provided with sun-shade. Sun shade shall be supported at least 10cm above cable tray, and should have 2 side slope along the cable tray.

3.8.3.5 Underground pathways

3.8.3.5.1 Pathway System

The pathway system (underground cable vaults, ducts, and ductbanks) is the foundational component of the outside plant communications distribution system. A pathway system designed with foresight provides for ease of administration, maintenance, future expansion, and replacement of cabling as technology changes.This section describes design considerations for the pathway system that are of particular concern to PCP. The Designer is expected to refer to the TIA/EIA and other relevant standards for other and more specific design criteria and detail.

3.8.3.5.2 General Design Considerations

Prior to design, the Designer is expected to meet with the Supervisor and review PCP requirements for the project. Items to review should include proposed pathway routing, aesthetic requirements, long range plans that PCP has regarding new and existing buildings, paved areas, opens spaces, etc. which could be affected by the design, and any unique requirements specific to the project.After the requirements review, a thorough and detailed field investigation shall be conducted. The field survey shall include, but should not be limited to:

1. A thorough review of existing records and a comparison of these records against actual field conditions.

2. Notation of the condition, suitability, and diagrams showing the locations of existing pathway, maintenance holes, and building entrances likely to be used during the course of the project.

3. Documentation of where the telecommunications pathway will require coordination with pathway used for other utilities.

4. Investigate adverse ground conditions and obstructions (such as buildings, trees, etc.) and any significant changes in grade along the



proposed pathway. 5. Notation of the existing paving types and the type of material used as

a base below the paving along the proposed route.6. Notation of the most desirable locations for new underground cable

vaults and ductbank routes, as well as any alternative locations and routes.

Detailed design should commence only after the field survey has been conducted and reviewed by the Supervisor.

3.8.3.5.3 Underground Cable Vaults (UCVs)

UCVs provide accessible space in an outside plant pathway system for the pulling, placing, and splicing of cables, as well as for maintenance and operations equipment. UCV’s are also used to segment the pathway system into lengths compatible with standard reel lengths for outside plant cable and to conform to maximum pathway lengths as defined in the TIA/EIA standards.Underground cable vaults consist of manholes and handholes/pullholes. UCV’s are also referred to as maintenance holes. Typically, manholes are installed for main ductbanks (i.e. ductbanks used for routing large portions of the telecommunications system backbone), and handholes/pullholes are installed for subsidiary ductbanks (i.e. ductbanks serving small clusters of buildings or a single building).The quantity of duct entrances in a UCV should be sized for both immediate and future requirements. Adequate capacity for future duct entrances will mitigate the need for future wall breakouts. Additionally, UCVs configured for splayed duct entrances (rather than center entrances) are preferred. Splayed duct entry facilitates racking and minimizes bending of the communications cable.When designing duct entry and exit from a UCV, it is desirable to have ducts enter and exist from opposite ends of the UCV. If possible, ducts entering the sidewalls of a UCV should be avoided, given that sidewall entry may reduce overall racking space, may cause minimum cable bend radii to be exceeded, can complicate (or hinder) future cable maintenance, and can increase construction costs during cable installation.If sidewall duct entry is necessary, the Designer shall ensure that ducts enter and exit at diagonally opposite corners rather than at endwall or sidewall midpoints. The Designer is to ensure that the design of the endwall and sidewall duct entry in a UCV will in no way hinder the proper installation and maintenance of the cable using the ducts.Other important design considerations for UCVs are:

• A UCV shall not be shared between telecommunications and any other utility (such as electrical). In no instance are joint-use UCVs permissible.

• All UCV’s should be equipped with provisions for grounding and bonding, struts for racking, pulling eyes, and a sump.

• In general, powered devices shall not be installed in UCV’s.• Top slabs for UCV’s shall be flush with the ground.



Design considerations unique to each type of UCV (manholes and handholes/pullholes) are discussed below.

3.8.3.5.3.1 Manholes

Manholes are used for pulling, placing, and splicing cables, and for providing accessible space for cable maintenance and operation equipment.Ductbank depth, obstructions, and other utility pathways may necessitate placement of a manhole below normal depth. If this is the case, the roof of the manhole shall be placed at normal depth and riser extensions shall be used to increase the depth of the manhole. By doing so, the need for a deep collar (neck) will be eliminated. Additionally, lighting and ventilation can be maintained at a normal level. If a deep collar is unavoidable and the depth of the collar will exceed 60 cm, the Designer shall obtain written permission from Supervisor and ensure that the collar is equipped with permanent galvanized steps (rungs).

3.8.3.5.3.2 Handholes/Pullholes

Handholes/pullholes are used to facilitate cable placement in a pathway system. Handholes should not be used in place of manholes or for splicing cables.The primary use of a handhole/pullhole is to segment the pathway system. A handhole should be used if it is shown that a manhole is not required and if one or more of the following conditions exist:

• When the bends in a section of duct will exceed 180-degrees (see Ducts, below).

• When the length of the section of duct will exceed the TIA/EIA standard maximum length (see Ducts, below).

3.8.3.5.3.3 Ducts (Conduit)

100 mm conduits shall be used for telecommunications ducts, with the following two exceptions:The type of conduit to be used is dependent upon the application:

• Conduit Type Usage• Schedule 40 PVC Encased in concrete• Schedule 80 PVC Direct-buried• Rigid Galvanized Steel Exposed • PVC Coated Steel Direct-buried, Transitions at building entrances

If the design utilizes any existing pathway, the existing ducts must be proven during design in order to ensure that the selected pathway is clear and serviceable. Acceptable proving methods are, in order of preference:

• Pushing/pulling a test mandrel through the duct • Blowing/pushing/pulling a ball through the duct • Pulling on a previously installed pull cord and observing free

movement on both ends. This method does not prove that a duct is adequate for a given number of cables, however it does suggest that the duct is probably not completely obstructed.



It is left to the Designer to select the appropriate method for proving a given duct. The proving method should be selected only after determining the quantity and size of the communications media to be placed in the duct and after reviewing the condition of the duct in the field.The conduit must have pull rope installed which is extended at least 1m outside from both ends of the conduit.

3.8.3.5.3.3.1 Duct Length

The length of each ductbank segment should be as long as possible (without exceeding the TIA/EIA maximum distance, see below) in order to minimize the use of intermediary UCV’s, cable splices, and labor during installation of the communications media. In general, longer contiguous ducts equate to lower construction costs.All conduit bends will have a radius no less than nine times the internal diameter of the conduit with a minimum radius of 90cm.No bends will be greater than 90-degrees.No more than two 90-degree bends in a run between pulling points. In addition, two 90-degree bends separated by less than 10 feet are not permissible.Conduit runs not to exceed 183 m between pulling points. Conduit runs shall also not exceed the maximum pulling length permitted for the planned type of cable.In order to minimize the sidewall pressure exerted on cable sheaths at bend points, the Designer should ensure that bends with the most severe radii occur at the beginning (feed end) of a duct section, rather than in the middle or at the pulling end.Where it is not possible to construct a section of duct within the 180-degree bend maximum, intermediary UCV’s must be installed.

3.8.3.5.3.3.2 Duct Entrances In UCV’s or Buildings

Duct entrances in a UCV should be as perpendicular as possible.Ducts should ideally enter UCV end walls at a point approximately halfway between the floor and the roof. However, where the total number of ducts penetrating a UCV (or building entrance) is significantly less than the capacity of the UCV (or building entrance), the ducts should enter at the lower level in order to ensure that upper space is reserved for future duct entrances.The Designer shall ensure that the relative position of a duct (with respect to the side walls) is consistent as it enters and exits a UCV. Additionally, a duct exiting a UCV in a given position should enter the next UCV in the same relative position.Ducts that enter from a horizontal orientation should immediately off-load into a horizontal raceway system.

3.8.3.5.3.4 Ductbanks

Ductbank consists of an arrangement of multiple ducts constructed in tiers. Typical ductbank arrangements are 2, 3, and 4 ducts wide by 2, 3, or 4 ducts high. As a standard, ductbanks constructed of PVC conduits encased in concrete,



with full-length reinforcement and formed sides, shall be usedIn general, direct-buried conduit ductbanks are not permissible, unless extenuating circumstances warrant. Should the use of direct-buried PVC conduit ductbank be warranted, the Designer should ensure that all PVC bends are encased in concrete.Where ductbank passes under paved surfaces capable of supporting motor vehicle traffic, conduit should transition to PVC coated rigid steel a minimum of 10’ outside the footprint of the paved surface.In general, ductbank used for telecommunications pathway should not be shared with other utilities. Budgetary constraints, space limitations, and various obstructions can make this difficult to achieve at times. Should shared ductbank be a necessity (rare situations requiring a deviation request), the Designer should ensure that adequate separation exists between duct used for telecommunications and duct used for other utilities.Ductbank Minimum Separations:

• Power or other duct: 75 mm if in concrete, 300 mm if in well tamped earth

• Pipes (gas, oil, water, etc.): 300 mm if parallel, 150 mm if crossingDrain slope should exist at all points of the ductbank to allow drainage and prevent the accumulation of water. A drain slope of 15 mm/m is desirable if possible.

3.8.3.5.3.5 Innerduct

The use of innerduct for subducting purposes is strongly encouraged (although it may not be applicable to every situation).It is left to the Designer to select the most appropriate configuration for subducting based upon the conditions of the duct and the application. Innerduct shall not be filled with cable beyond 50% capacity.

3.8.3.5.4 Grounding and Bonding

Cables with an outer metallic sheath shall be bonded at each UCV. Bond all other cables with dielectric components whenever a splice is made.When a splice occurs in a UCV, metallic sheath components in the cable(s) and splice enclosures must be bonded to the UCV grounding system. Additionally, cable shield bond continuity shall be maintained.Cables should be grounded as close to the entrance of the buildings as possible.

3.8.3.6 Aerial pathways

In case underground pathways are not possible, aerial pathways can be used. When used, the following must be considered: aesthetically pleasing appearance of the installation, regulations, separation and clearances from roads and buildings and electrical equipment, storm loading and potential for future growth.

3.8.3.7 Underfloor duct

Underfloor duct is a system of distribution and feeder ducts or a network of



raceways embedded in concrete. Distribution ducts are those ducts from which the wires and cables emerge to a specific work area. Feeder ducts are those ducts which connect the distribution ducts to the telecommunications equipment room.One work area requires one 40mm pipe, with maximum fill ratio of 40%.Feeder ducts maximum fill ratio is 40%


Multiple conduit runs or banks shall be supported on preformed non-metallic separators. Spacing between separators shall be close enough to prevent sagging of conduits and breaking of couplings and water tight seals. Separators shall be secured with cords where necessary and not tie wires.Duct lines shall have a continuous slope downwards away from building. Trenches shall be excavated along straight lines so the elevation can be adjusted if necessary to avoid unseen obstructions.During construction, partially completed duct lines shall be protected from the entrance of debris such as mud, sand, and dirt by means of suitable conduit plugs. As each section of duct line is completed a test mandrel not less than 300 mm long with a diameter 6 mm less than the size of the conduit shall be drawn through each conduit, after which a brush with stiff bristles shall be drawn through until the conduit is clear or all particles of earth, sand or gravel; conduit plugs shall then be immediately installed.

3.8.3.8 Access floor

Access floor is made up of modular floor panels supported by pedestals. Used in equipment rooms and general office areas. Penetrations may be located anywhere on the access floor.

3.8.3.9 Conduit

Conduit is a metallic or PVC tubing. Metal flex conduit is not allowed. Not recommended for horizontal raceway system unless outlet locations are permanent and flexibility is not a requirement.A section of conduit cannot be longer than 30m and cannot contain more than two 90 degree bends between pull points or boxes. The conduits maximum fill ratio allowed is 40%. Each 90 degree bend reduces the conduit capacity by 15%. Bend radius must not be less than 50 mm.

3.8.3.9.1 Metal conduits

All metal conduits shall be heavy gauge welded steel complying with BS 4568, not less than 20mm diameter and finished with hot dipped galvanising providing heavy protection (Class 4) both inside and outside. All conduit and fittings shall be free from rust or other defects.All conduit fittings shall be malleable iron manufacture complying with BS 4568.All fittings shall have a hot dipped galvanized finish.All bushes shall be hexagonal headed, heavy duty, long threaded brass bushes



complete with serrated tempered shakeproof washers. All bends shall be cold set. All tees shall be made using circular tee conduit boxes.All saddles shall be of the spacer bar type and of the same finish as that of the conduit which they are being used to secure.A tapped earth connection facility shall be provided in every box.All accessory boxes shall have one adjustable fixing lug to facilitate final leveling of accessory.


Where conduits are to be cast in concrete, they shall be secured using crumpets, clips or saddles as approved by the Supervisor.All ends of conduits shall be reamed to remove all traces of burrs.Conduit threads shall be of sufficient length to allow conduits to butt together within couplers.Oil and grease shall be removed from all threads.Conduits shall be supported at intervals of 1.5 m in isolated positions or 1 m in accessible situations.Conduit shall not be permitted to be installed closer than 75 mm to pipes of other services.All conduit boxes not to be fitted with accessories shall have metal cover plates which shall be overlapping where flush boxes are used.'Draw in' boxes shall be provided in conduit runs exceeding 3 m in length. 'Draw in' boxes shall be at maximum 12 m spacing and readily accessible at all times. Adaptable junction boxes shall also be accessible at all times for inspection and maintenance.Inspection elbows, bends or tees shall not be permitted for flush installation.Care shall be taken to prevent water, dirt and debris from entering the conduit system.Extension rings shall be used where boxes are found not to be flush with the finished surface.Conduits and conduit accessories shall be protected from rust and mechanical damage. Exposed conduit threads and damaged or rusty areas shall be painted, using an oxide undercoat and aluminum paint, after being cleaned to bare metal.Conduits installed in areas subject to corrosive atmospheres shall be painted with chlorinated rubber paint after the installation is complete.Under no circumstances shall metal conduit be used as a circuit protective conductor (CPC). Every final sub-circuit shall incorporate its own separate Cu/PVC CPC.Spacing or fill factors shall be applied to all conduits in accordance with chapter 522-08 of the IEE Wiring Regulations, 16th Edition.EMT conduit shall be used above false ceiling installation.Rigid steel conduits shall be used for exposed installation.Under no circumstances, any conduit shall be allowed to run in the floor screed of toilets, bathrooms or any other wet area.



3.8.3.9.2 Flexible conduits

Flexible conduits, not less than 20 mm diameter, shall only to be used for final connection to items of fixed equipment subject to vibration.Flexible conduit and adaptors shall be manufactured in accordance with BS 731 Part 1.Brass adaptors shall be provided for connection at either end of the flexible conduit and should be of the compression type.Flexible conduit shall be of the weather proof liquid-tight type having an overall PVC sheath. No length shorter than 500mm of flexible conduit shall be used unless specified elsewhere in this specification.


Flexible conduits shall only be used in short lengths, of less than 1m, in cases where a final connection is required to be made to a fixed item of equipment which is subject to vibration.Flexible conduits shall be 1.25 x L, L being the direct distance between connection unit and fixed appliance, up to maximum length of 1m.Purpose made glands shall be used on the ends of all lengths of flexible conduit.A separate Cu/PVC circuit protective conductor shall be included in all lengths of flexible conduits.Conduits shall be installed so as not to incur undue mechanical strain, damage or excessive temperatures.

3.8.3.9.3 PVC conduits

All PVC conduits shall be U.P.V.C. Rigid Conduits complying with BS 6099-2-2/614-2-2 I.E.C. heavy gauge in all respects, and may be used where ambient temperatures do not exceed 75oC.All conduit fittings shall confirm to BS 6099-2-2/IEC 614-2-2 standards and BS 4607 Part 5.No conduit shall be less than 20mm diameter.Conduit boxes shall be of the B.E.E.S.A. circular pattern with appropriate spout entries and 50.8mm accessory fixing centres.All connections and terminations shall be by means of a manufacturer's standard adaptor. All boxes shall have brass thread inserts for the fixing of accessories or covers.However care must be taken in the support of totally enclosed lighting fittings. Where excessive temperatures are likely to occur special insulated boxes shall be used, i.e. of a pattern specifically designed by the manufacturer to improve weight-loading characteristics at high temperatures.All tees shall be made using conduit tee boxes. Tangential entry boxes shall be used where appropriate. Multiple conduits may necessitate the use of large U.P.V.C. adaptable boxes for junctions.All saddles shall be of the spacer bar type and from the same manufacturer as that of the conduit which they are being used to secure.A tapped earth terminal shall be provided in every conduit box.All wall mounted accessory boxes shall have one adjustable fixing lug to



facilitate final levelling of accessories.In order to facilitates interchangeability and to eliminate problems of differential manufacturing tolerances, it is essential that all PVC conduit and appropriate accessories covered by this specification shall be obtained from the same manufacturer.


Where conduit boxes are not to be fitted with accessories, they shall be fitted with cover plates which shall be overlapping where flush boxes are used.Conduits shall be jointed and terminated utilizing the following appropriate components as supplied by the conduit manufacturer:

1. Purpose-made adaptors and accessories.2. Permanent adhesive - Solvent cement to produce a rigid watertight joint

when used with standard couplers and accessories.3. Flexible adhesive - A non-hardening adhesive to be used where

expansion facilities are required in long conduit runs, in conjunction with expansion coupler.

Conduits up to 25 mm diameter may be bent cold with the use of the appropriate bending spring obtained from the conduit manufacturer. For larger size conduits, it is necessary to use heat or appropriate manufacturer's standard ready made bends.Adequate allowance shall be made for linear expansion and contraction of the conduits under normal working temperature variations, as follows:

1. Expansion couplers shall be used on all straight runs of conduit exceeding 6 meters in length.

2. Conduit shall be free to slide within saddles.3. Allowance for expansion in cast in-situ installation is normally only

required to effect structural movement at building expansion joints.Conduit shall be supported at intervals of 1.5 meters in isolated positions or 1 meter in accessible situations. Where working temperatures tend to be high, this spacing shall be reduced accordingly.Multiple conduits may necessitate the use of large PVC adaptable boxes for junctions, which shall be readily accessible at all times.Care shall be taken in the support of totally enclosed lighting fittings. Where excessive temperature are likely to occur special heat resistant boxes shall be used, i.e. of a pattern specifically designed to improve weight loading characteristics.Spacing or fill factors shall be applied to all conduit in accordance with chapter 522-08 of the IEE Wiring Regulations, 16th Edition.Conduits shall not be installed closer than 75 mm to pipes of other services."Draw-in" boxes shall be installed in all conduit runs exceeding 3 m in length at a maximum 12 m spacing and shall be readily accessible at all times.Inspection elbows, bend or tees shall not be permitted for flush installation.Extension rings shall be used where boxes are found to be not flush with the finished surface. Care shall be taken to prevent water, dirt, dust or debris from entering the conduit system.PVC conduits shall be used for embedded installation only.



Under no circumstances, any conduit shall be allowed to run in the floor screed of toilets, bathrooms or any other wet area.

3.8.3.9.4 Electrical metallic tubing (EMT)

EMT conduits shall be made of galvanized steel.EMT conduits shall comply with ANSI/NEMA standards.EMT fittings and accessories shall be made of galvanized steel.Compression type connectors shall be used.

3.8.3.10 Ceiling pathways

Ceiling tiles must be removable and placed at a maximum height of 3.4m above the floor.A minimum of 75mm of clear vertical space above the ceiling tiles must be available.Cables must not be laid directly on the ceiling tiles or rails. Suitable means of supporting the cables must be used, including raceways if required.Inaccessible areas are not to be used as distribution pathways.

3.8.4 Perimeter raceways

Perimeter raceways are used to serve the work areas. The perimeter raceway shall be installed in parallel to floor and wall lines, and shall be otherwise orderly and tidy.Maximum distance between two work area sockets is 6m.Perimeter raceway maximum fill ratio is 50%.Four types of perimeter raceways are defined:

3.8.4.1 Built in walls (recessed)

Raceway recessed inside the wall. Sockets recessed or surface mounted, as defined in the special requirements per case.

3.8.4.2 Surface installed trunks

Raceway on the surface of the wall. Properties of the raceway to include:

• modular trunks• sockets in the trunks• adjustable bends and angles• multi-figurable tees• must be designed for ANSI/TIA/EIA 568B and 569B, ISO/IEC11801• separator for high and low voltage cables• cable holders and ties for pull reduction

Adjoining sections of trunking shall butt tightly. Where cutting is necessary to fit the sections, the cut lines must fit each other perfectly. The imprecision or deviation at the joint must not be more than 1.3mm.Model of the trunk in use by PCP is Iboco, size of the trunk is 60x120mm.The installation requirements specified in section “Cable trunking” and its subsections shall be followed.



3.8.4.3 Furniture raceways

Defined case by case as needed.

3.9 Equipment rooms

3.9.1 Entrance facility

Entrance facility is the location where telecommunications service enters into a building and/or where backbone pathways linking to other buildings are located. The entrance facility may contain public network interface devices as well as telecommunications equipment. The entrance facility can be combined with the main equipment room of the building. All the requirements of the equipment room also apply to the entrance facility.Approximately 5m of cable shall be formed into a re-termination (service) loop inside the entrance facility. The cable shall be coiled and secured in a suitable place. Bend radius limitation shall be followed for the cable types. Backbone cables shall be suitably anchored to the building fabric.

3.9.2 Telecommunications equipment room

The equipment room is a centralized space for telecommunications equipment such as PBX, computer servers and network switches. Telecommunications equipment room and entrance facility can be in the same room.

3.9.2.1 Definition

Equipment room is a transition point between the backbone and horizontal distribution pathways. Equipment room shall be dedicated to the telecommunications function and shall not be shared with electrical installations other than those for telecommunications.The number of telecommunications equipment rooms shall be decided at the planning phase considering the requirements and size of the building.Main equipment room of a building or a complex of building shall be designed to accommodate a possible central UPS without modifying the room.

3.9.2.2 Location

Recommended height 3.5m at the lowest point of the ceiling. Must not be less than 2.4m. There must not be false ceiling in the equipment room.Equipment room should have concrete floor with load-bearing capacity at least 500 kg / m².In critical equipment rooms or server rooms there must be possibility to create waterproof roof to eliminate the risk of leakage from above.The equipment room shall be above ground (water level), and at a safe distance from water pipes and high voltage electrical equipment. If there is a risk of water infiltration, additional sewage and pumps and controlling system must be installed to reduce the risks from surface water.Water, sewage or flammable gas pipes must not pass through or directly above the equipment room.



The equipment room must not be located where a risk of leaks exists , like under kitchens, workshops, bathrooms or other similar.The equipment room must be shielded from EM radiation.The floor of the equipment room must be covered with anti-static carpet.The equipment rooms must be equipped with automatic sensors (smoke, water, fire, temperature), and automatic fire suppression system.The building must be equipped with a lightning protection system.The telecommunications equipment room shall be in a central optimum position considering the backbone, entrance facility and work areas.The distance between work area and equipment room measured by cable length shall not exceed 90 m. Additional telecommunications equipment rooms are required if the horizontal distribution cable required to reach the work area is longer than 90 m.

3.9.2.3 Security

The equipment room must not be adjacent to rooms used by third parties.The design of the equipment room must allow future expansion to accommodate increasing number of equipment.Other buildings must not be close enough to pose a risk to the equipment room when the other building collapses, floods or catches fire. This applies also to the possible consequences of dealing with these events.Equipment room must not have windows or light walls.The entrance of the equipment room must be controlled 24 h and be under technical surveillance.The equipment room shall be located in an accessible area, but not in proximity to high-traffic paths of personnel. It should be in a location with the least traffic. There must not be more than 1 door / entrance to the equipment room to prevent pass-through traffic.

3.9.2.4 Size requirements

0.07 m2 per one work area, but not less than the minimum size below.Minimum size: 3000x2200 mm.Minimum size for installations which require centralized UPS: 3000x3000 mm.

3.9.2.5 Other requirements

Lighting in the room must be at least 500 lx measured 1 m above the floor. Must have emergency light with rechargeable batteries with capacity to run for 2 hours.The room shall be accessible for delivery of large equipment. The door of the equipment room must be a minimum of 910 mm wide and 2100 mm high, without doorsill, hinged to open outward and fitted with a lock. For a bigger server room, a double door 1820 mm wide and 2280 mm high without doorsill and without a center post is recommended.The equipment room must have continuous mode cooling, designed to run 24/7/365, keep the room temperature between 18 and 24 degrees, humidity rate between 30% and 55%. Typical heat loading for an equipment room is between 5 and 12 kw.



Fire extinguisher: non-toxic, non-corrosive, gas or aerosol.

3.9.2.6 Electrical requirements

Independent power cable 5-wire (3PH + N + G) with a dedicated 3-phase breaker, an IEC 60309 socket and plug and a maintenance breaker next to the socket shall be installed for each communications cabinet;

• Two double power outlets should be provided, with separate circuit breaker.

• Two double UPS outlets should be provided, with separate circuit breaker.• A dedicated Telecommunications Grounding Busbar (TGB) shall be

installed for connecting systems and equipment in the location served by the equipment room.

Every rack cabinet must be connected to the TGB using a dedicated direct link. Chain connecting of the grounding connections is not allowed.

3.9.2.7 Cabling in equipment room

High-level 300mm wide basket tray shall be routed around the perimeter of the room with spurs routing to any installed cabinets. Backbone cables shall be linked to this system, after any re-termination loops have been installed.CAT6 patch cables shall be no longer than 6m in the equipment room.Network connections in the equipment room:

• one standard work area socket set installed including the power sockets as defined in the respective document.

• one CAT6 cable provided to the entrance door for electronic access control

• one CAT6 socket on the wall at 2000mm height, away from AC for environment monitoring equipment

• one CAT6 socket on the wall at 300mm height, away from AC for environment monitoring equipment

3.9.2.8 Equipment rack

Equipment rack shall be standard 19” server cabinet with two rails (front and back), model HP 10642 G2 with the following specifications:

• 42U, 2000 mm high, 1000 mm deep• 19” front mounting, square hole• Ventilated top cover with fans installed• Locking front and rear doors• Locking side panels• Grounding bars for the equipment and patch panels

For locations with only switches and adapters to be installed (no servers), a 2-post rack shall be installed with the following requirements:

• 42U, 2000 mm high• Floor-mounted• 19” front mounting, square hole• Grounding bars for the equipment and patch panels



3.9.2.9 Patch panels

Patch panels used shall be:• 1U, fitting in the standard 19” rack• 24 ports in one row• modules compatible (as defined in sockets section)

No more than 50% of any rack cabinet may be filled with patch panels, and no less than 5U will be left free for other equipment.Every patch panel must be grounded separately to the main grounding bar of the cabinet. Chain connecting of the grounding connections is not allowed.Air patch panels for cable management: Air patch panel size shall be 0.5 U

3.10 Electrical distribution systems

3.10.1 Main Distribution Equipment

3.10.1.1 General

3.10.1.1.1 Description

The main distribution equipment shall comprise main low tension switch boards, switching metering panels, main and sub-main switch boards, distribution boards, isolators, switch fuses ...etc.The supply and distribution arrangement shall be as indicated on schematic diagrams in the Drawings.The equipment shall be assembled and tested in the factory of the approved local panel builder/manufacturer. Where any equipment need to be assembled at site, a prior approval of the Supervisor would be necessary.Before placing any order for the supply of equipment, it shall be ensured that the physical sizes of equipment when installed shall not infringe any clearance required by the concerned local authorities regulations. Where no such regulation is available IEEE regulations shall be applied.The contractual responsibility for the supply and installation shall be as indicated on drawings.

3.10.1.1.2 Standards

Switchboards and Motor Control Centers shall comply with the following as appropriate. Where no regulation / standards are mentioned latest IEC standards shall be applicable.BS 88 Cartridge FusesBS142 (Latest) Electrical Protective RelaysBS 159 Bus bar & ConnectionsBS 162 Electrical Power SwitchgearBS 3938 IEC 185 Current TransformersBS 4794 IEC 337-2 Control DevicesBS 5685 Electricity Meters GeneralBS 89 IEC 51 Direct Acting Indicating Electrical Measuring Inst.



BS 5685 IEC 521 Electric MetersBS 5420 IEC 144 Degree of Protection of enclosuresBS 4752 IEC 947-2 Switchgear & Control GearIEC 947-4 ContactorsIEC 947 (Part 1-7) Low Voltage Switchgear & Control GearIEC 439 (Part 1-4) Low voltage Switchgear & control gear assemblies

3.10.1.2 Main low tension panel boards

The main low tension switch boards shall be of indoor construction, dead front, metal enclosed free standing, dust and vermin protected, front operated and of clean and modern appearance.The switchboards shall be assembled and coordinated by one manufacturer and shall be constructed in accordance with B.S. 5486 : part 1.1977/IEC 439.The panel shall be of the cellular cubical type class 2CC FBA and shall be of the folded sheet steel construction fabricated out of electro galvanized cold rolled sheets of minimum 2mm thickness for body and frame work and not less than 1.5mm for doors and cover plates.The panels, after fabrication, shall be thoroughly cleaned in a vapor degreasing tank to remove all traces of oil and wax and provided with a coat of electrostatic, polyester powder coating, light grey colour, shade No. 10A03 to BS 4800.All doors and removable cover plates shall be provided with neoprene gasket so as to obtain degree of protection IP53 to IEC 144.Each outgoing breaker shall be enclosed in its own compartment (cell) fitted with a hinged door interlocked with the operating handle in such a way that:

1. It shall be possible to open the door only when the handle is in ‘OFF’ position.

2. It shall not be possible to switch the unit ‘ON’ when the door is open.Moreover, no live parts shall be exposed when the compartment door is open.Protection against shock shall be provided in accordance with the requirement of BS 5486 Part 1.The switchboard shall be of the rear access pattern and vertical cable way shall be provided in each section of the switchboard. The cable way shall be provided with bolt-on covers. All terminals in the cable way shall be fully shrouded to prevent accidental contact when the covers are removed.All external bolts or screw heads shall be chrome or cadmium plated.The equipment in the switchboard shall be accessible with indicating instruments mounted not higher than 1.8m. And the centerlines of operating devices not higher than 1.8m. Above switchboard base. The switchboard shall be properly fixed to the floor with foundation bolts grouted in the floor or bolted to channels laid across the cable trench.The switchboards shall have top or bottom cable entry as required. Basically, main incoming cables shall be bottom entry and outgoing cables top entry.The switch boards shall contain the air circuit breakers, bus bars, bus couplers, MCCBs, instruments, earth bus, ...etc. as specified here under and as per drawings with ratings and arrangement as shown on the Drawings and shall be complete with all internal wiring and connections.



The switch boards shall be tested at the manufacturer’s premises as well as commissioned after installation in accordance with tests stipulated in IEC 439.Additionally, Main Low Tension Switch Board shall comply with the concerned local authority’s requirements.

3.10.1.3 Busbars

The switchboard shall be provided with fully rated Bus bars for the entire width of the board. In addition, each section or panel of the switchboard shall be provided with vertical busbars of adequate rating to provide branch connections to the outgoing breakers.The horizontal and vertical bus bars and connection shall be fully segregated such that these shall not be accessible when the compartment doors and cable way covers are opened. They shall be provided with barriers which are removable by tool or special key.The bus bars shall be made of electrolytic, hard drawn high conductivity flat pure tinned copper bars complying with IEC Standard. The whole bus bar system shall comply fully with the requirement of latest IEC standards.The bus bars shall be air insulated and shall be rigidly supported on purpose made insulators of non-hygroscopic glass fiber moldings having a tracking index of not less than 600.The Main Low Tension Panels (MLTPs) busbar together with its connections to the incoming and outgoing unit shall be suitable to withstand a short circuit of 50,000 sym. amperes and in all other cases; it shall be suitable for the fault level at that point.The bus bars shall be provided with colored PVC sleevings at regular intervals for phase identification. Painted bus bars may be acceptable in special cases when panels are manufactured/assembled locally.

3.10.1.4 Air circuit breakers

The air circuit breakers shall be of the air break trip free draw out type with the main contacts encased in a reinforced polyester casing and offer double insulation from the operators on the breaker front face. The air circuit breaker shall be fully tropicalized (T2) as defined in IEC 68.2.30 and shall have salt spray resistance as per IEC 68.2.11. The ACB shall comply with IEC 947.2 utilization category B with Ics=Icu=Icw and shall accept reverse feeding without reduction of performance. The ACB shall comply with the isolating function requirements of IEC 947.2 section 7.1.2 and shall have minimum 500 V 50Hz operational voltage, 1000 V 50 Hz rated insulation voltage and 8kV withstand surge voltage (Vimp). The 3-pole and 4-pole versions shall have ratings as shown in the drawings. In the 4 pole version the neutral pole shall have the same current rating as the other poles from 800 to 4000A . The breaking capacities shall not be less than 50 kA symmetrical for 1 sec. at 415 volt. Evidence of the service breaking capacity (Ics) shall be produced by test certificates from one of the internationally recognized testing Laboratories. (ASTA, CESI, ESEF/ASEFA, KEMA, PEHLA or SATS).Unless otherwise mentioned the ACB shall be of the O-C-O stored energy spring type with a closing time less than or equal to 80 millisecond. Electrically



operated circuit breakers shall have the spring charging motor connected so that the springs remain charged always with the motor disconnected after charging. The spring charging time shall not exceed 4 seconds. A standby manual operating handle for spring charging shall be provided for operating the circuit breaker in case of power or motor failure. Antipumping shall be provided by integral devices to prevent reclosing after a close-open operation if the closing impulse is maintained after the breaker has opened. External relays are not acceptable.The circuit breaker shall have three positions of the drawout mechanism, namely service position where all main and auxiliary contacts are made, test position where main contacts are open but auxiliary contacts are closed and isolated position where all contacts are open. Mechanical indication on the front of the ACB shall be provided to indicate:

• Main Contacts Closed ‘On’, • Main Contacts Open ‘Off’, • Springs Charged, • Springs Discharged • Service Position, • Test Position, And • Isolated Position For Drawout Mechanism.

Any attempt to withdraw or insert the breaker when it is ‘ON’ shall trip the breaker automatically. An interlocking shall be provided to prevent insertion of a circuit breaker having a rating higher than the current rating of the ACB cradle.Insulated safety shutters shall screen all live parts in the ACB cradle when the breaker is in the isolated or racked out position. The moving contacts comprising the main and arcing contacts shall have visual wear indicator and be of the spring loaded type. The main contacts and clusters shall be site replaceable. The electrical endurance shall not be less than 4000 operations for rating up to 3200A and not less than 2000 operations for ratings above.The circuit breakers shall have sufficient number of auxiliary contacts for interlocking system as indicated and described on the drawings and for interfacing with building automation system (BAS), with two spare sets of normally open and normally closed contacts. It shall be possible to connect all auxiliary wiring from the front face of the air circuit breakers and this wiring shall be taken through a set of disconnecting contacts, so that all auxiliary wirings are automatically disconnected in the isolated and drawout positions.The circuit breakers shall be equipped with MCR, overcurrent and earth leakage protections by means of integral self-powered microprocessor based solid state RMS sensing current relays. The long time overcurrent protection shall have a setting range between 40 and 100 per cent of sensor rating in steps of 2 per cent. The corresponding time delay shall be adjustable from 15 to 480 seconds The short time overcurrent protection shall have a setting range from 40 per cent to 15 times the sensor rating. The corresponding time delay shall be adjustable from 15 seconds. The sort times the sensor rating. The corresponding time delay be adjustable from instantaneous to 400 milliseconds with the possibility select time inverse characteristic for improved



discrimination. Instantaneous overcurrent protection shall be adjustable from 2 times the current up to the circuit breaker electrodynamical withstand. The earth protection shall have current settings from 10 per cent of the rated current 1200 A in steps of 10 per cent. The time delay setting shall be variable 100 millisecond to 400 millisec in steps of 100 millisec.The RMS value of the phase currents and interrupted current values shall be displayed on the built-in digital ammeter and the LED’s shall indicate the type of fault on the front face of the trip unit. An indicator shall give indication of the main contact wear according to the number of operations and the values of the switched currents. A bar graph shall display the load indication of each phase and the highest value of phase currents shall be stored and displayed on demand. Trip unit malfunction or internal overheating shall be indicated by a self monitoring alarm.(Some features may differ from one manufacturer to another)The air circuit breaker used on bus-section shall be identical to Air Circuit Breaker specified but with only the Making Current Release (MCR) protections and instruments specified but with the following indications :

• Circuit breaker closed.• Circuit breaker open.• Circuit breaker tripped.

The main low tension panels shall be provided with cable boxes to suit the incoming cables from the transformer which are supplied and installed by the concerned local authorities.

3.10.1.5 Current transformers

Current transformers shall be of Class C accuracy for indication and Class CM accuracy for metering purpose. The secondary windings shall be rated at 5A and the rated output shall be suitable for the burden.

3.10.1.6 Instruments

The measuring instruments shall include ammeter voltmeters, maximum demand indicators and selector switches as indicated on the Drawings.The instruments shall have anti-glare glass fronts, anti-parallax scales and white faces with black numerals and markings. The instrument cases shall be semi-flush mounted and shall be approximately 100 x 100mm square. Accuracy shall be one percent of full scale values. Moving elements shall be provided with zero adjustments external to the cases.Ammeters shall be moving iron type, to B.S. 89 scaled 0-2000 A for main incoming supply.Voltmeter shall be moving iron type to B.S. 89 scaled 0-500V and provided with 6-position selector switches allowing reading of line to line and line to neutral voltages.Maximum demand indicators shall be of the thermal type with a 15-minute time delay.

3.10.1.7 kWh meters

The kWh Meters for the concerned local authorities shall be suitable for



operation on 415/240 volts, 3 phase, 4 wire, 50 Hz supply.The meter shall be absolutely dust and vermin proof, protected from corrosion due to high humidity and compensated against the effect of temperature up to 55°C.The Meters shall maintain their accuracy over many years service under Jordan climatic conditions. The counters shall be of the cycle-meter type with six digits and shall give a direct reading of power consumption to six figures, the lowest figure being units and not tenth of units. Pointer type counters are not acceptable.Multiplying factors shall not be used except for the larger size of current-transformer operated meter, where 10 and 100 may be used. The calibrating adjustments shall be operated by screw-driver only.The Meter cover and cases shall be of metal and not plastic.The ratings for direct connected whole current meters shall be 50, 75 and 125 amperes maximum per phase and the terminal holes shall not be less than 6,9 or 12mm. diameter respectively.Higher ratings meters shall have not less than 5mm. diameter terminal holes and shall be operate through current transformers with 5 amperes rating to the secondary side and the counter or the meter shall be calibrated to read the primary Kwh passing through the current transformers.The current transformers shall be of the ring or slide on busbar type.Three current transformers of 2000/5A shall be provided for each meter.All meters shall be handed over to the concerned local authorities for calibration before final erection and connection.

3.10.1.8 Fuse switches

Fuse switches shall fully comply with BS 5419:1977, IEC 408:1972 meeting all of the concerned local authorities requirements.

3.10.1.9 Moulded case circuit breakers

The moulded case circuit breakers shall comply with IEC 947-1 and IEC 947-2 standards and shall be of the quick make and quick break type having free toggle mechanism ensuring full contact pressure until time of opening, whether actuated automatically or manually. They shall be of utilization category ‘A’ having rated service breaking capacity (Ics) as indicated in the drawings. The circuit breakers shall be suitable for isolation as per IEC 947-2 and shall have rated operation voltage of 500V 50 Hz, insulation voltage of 750 V, 50 Hz. The breaker shall be available in 3 or 4 pole version as per the drawing. All poles shall operate simultaneously for circuit breaker opening, closing and tripping. The mechanism shall be completely enclosed in the compact moulded bakelite case. The moulded case circuit breaker shall provide class II insulation (according to IEC 664) between the front and internal power circuits. The breaker shall be designed for both vertical and horizontal mounting and it shall be possible to supply power either from the upstream or downstream side without any adverse effects on the electrical performance. Evidence of the service breaking capacity (Ics) shall be produced by test certificates from one of the internationally recognized High Voltage Laboratories (ASTA, CESI,



ESEF/ASEFA, KEMA, PEHLA or SATS).Breakers contacts shall be made of non-welding and non-corrodible composition. Circuit breakers shall be actuated by a toggle or handle that clearly indicates the three positions ‘ON’, ‘OFF’ and ‘TRIP’ thus indicating clearly abnormal conditions of the circuit. In order to ensure suitability for isolation complying with IEC-947-2, the operating mechanism shall be designed such that the toggle or handle can only be in OFF position if the power contacts are all actually separated. The molded case circuit breakers shall be able to receive a locking device in the “isolated” position and there shall be a “push to trip” button in front to test operation and the opening of the poles. The circuit breaker rating, the ‘push to trip’ button, outgoing circuit identification and the contact position indication must be clearly visible and accessible from the front, through the front panel or the door of the switchboard. Single pole breaker with handle tie or bar equivalent construction are not acceptable for a multi-pole breaker. Molded case circuit breakers shall be the fixed type. Plug in type breaker connections are not acceptable.Breakers shall have the rating and rated service breaking capacity (Ics) as per IEC 947-2 as indicated in the drawings. The breakers shall be of current limiting type. For short circuits, the maximum thermal stress I²t shall be limited to 106 A²s for ratings up to 250A and 5 x 106 A² s for ratings above up to 630A.Circuit breakers shall have inverse time tripping characteristic with automatic release secured through action of a combination of thermal-magnetic or electronic trip units which shall trip free of the handle and operate in response to an overload or a short circuit.It shall be possible to equip the moulded case circuit breaker with a motor mechanism if needed and closing of mechanism shall take place in less than 80 ms. The operating mechanism shall be of the stored energy type only. The addition of motor mechanism or a rotary handle shall in no way affect circuit breaker characteristics and shall not block device settings.The MCCB’s shall be designed for adding auxiliary contacts such as shunt or undervoltage releases after installation at site. The auxiliaries shall be separated from power circuits. It shall be possible to install auxiliary switches for fault/status indication in already energized MCCB without the need to trip the MCCB.It shall be possible to assemble earth fault protection of MCCB’s by adding a residual current device directly to the circuit breaker case and it shall operate without an auxiliary power supply. The add on RCD’s shall comply with appendix B of IEC 947-2 standard. They shall be immunized against nuisance tripping as per IEC 255 and IEC 801-2 to 801-5 standardsMCCB with ratings up to 250A shall be equipped with thermal magnetic or electronic trip units which are fully interchangeable types. The breakers with ratings over 250A shall be equipped with electronic trip units which shall remain operational for ambient temperatures up to 60°C. Electronic trip units shall comply with appendix F of IEC 947-2 standard. It shall be possible to fit lead seals to prevent unauthorized access to the settings of the electronic and thermal magnetic trip units.MCCB’s equipped with thermal magnetic trip units shall have adjustable thermal protection and fixed magnetic protection for current ratings up to



160A. For current ratings greater than 160A the thermal magnetic trip units shall be adjustable from 5 to 10 times the current rating. In four pole breakers the neutral pole shall have the tripping threshold equal to that of the phases unless otherwise stated in the drawings.MCCB’s up to 250A frame size equipped with electronic trip units shall sense the actual RMS values for:

• long time protection from 40% to 100% of the trip unit rating, • the short time protection shall be adjustable from 2 to 10 times the

thermal setting, • the instantaneous protection shall have the threshold fixed between 12

and 19 times nominal current, depending on the rating.MCCB’s over 250A up to 630A frame size shall be equipped with electronic trip units shall sense the actual RMS values for:

a) long time protection from 40% to 100% of the trip unit rating, b) the short time protection shall be adjustable from 2 to 10 times the

thermal setting,c) the instantaneous protection threshold shall be adjustable from 1.5 to 11

times nominal current andd) a thermal memory (in the event of repeated overloads, the electronic trip

units shall optimize protection of cables and downstream devices by memorizing temperature variations).

A load monitoring function shall be an integral part of the electronic trip units indicating four load levels (60%, 75%, 90% and 105%) by LED’s (with flashing LED for 105%). It shall be possible to install with the electronic trip unit a high threshold earth fault protection, load monitoring and LED’s in front to indicate the cause of tripping. It shall be possible for the MCCB to communicate with Building Management System (BMS).The following frame sizes shall be adopted for different breakers:

• up to 80A 100/125A frame size• 100A to 160A 250A frame size.• 250A to 350A 400A frame size.• 350A and above 630A frame size

Each MCCB’s shall have minimum 2 pairs of NO /NC auxiliary contacts

3.10.1.10 Earth leakage relays

3.10.1.10.1 Earth Fault Relay

The relays shall comply with IEC 755The relays shall be protected against nuisance tripping caused by switching surges or by lighting surges.The relays shall be of solid state type (mechanical type shall not be accepted),self protected from high magnitude earthfaults and protected against dirt, vibration and moisture.The relays shall be able to operate in the presence of fault currents with DC components.Each relay shall accept a wide range of auxiliary supply voltages from 48V to 240V AC and 48V to 300V DC as per the requirement in the drawings.



The sensitivity of relays shall be adjustable as per the requirement in the drawings from 0.03A to onward. The relays shall have time delay option if required from instantaneous to 1 sec. using an 8 position switch.The size of the relays shall be compact. They shall be suitable for mounting on symmetrical rail horizontally or vertically.The relays shall be equipped with one changeover output contact. The continuity of the measurement circuit shall be monitored to ensure that the toroid circuit is not open.

3.10.1.10.2 Current Sensors (Toroids)

Rectangular type for busduct feedersCircular type for cable feedersThe range of associated toroidal transformer shall be of the closed type with an inside diameter of 30 to 200 mm. To have cable guides to ensure that feeder cable is centered within the sensor.The maximum link resistance from toroid to relay link must not exceed 3 ohms.Current operated earth leakage relays shall be used either in conjunction with circuit breakers for tripping the breakers or for giving alarm signal only by an indicator lamp and alarm bell in cases of earth leakage.

3.10.1.11 Earth bus

The copper earth bus shall be minimum 50% of the phase conductor size extending throughout the length of the switch board and fixed to the steel members of the switch board. The earth bus shall be extended at the ends for connection to the earth electrodes and shall have provision for terminating earth continuity conductors.

3.10.1.12 Central UPS

The electrical installation shall include the UPS change-over circuits and all necessary devices to facilitate automatic operation and manual switching between UPS and normal (bypass) power. The bypass switch shall be of zero-crossing type and guarantee faultless and continuous power to the equipment powered by it.The central UPS shall be according to the projected load at the given site. However, the general requirements for the central UPS are the following:• Form factor

o Rack mounted, standard 19' rack included• Output

o Output Power Capacity: according to site requirementso Output Voltage: 220V 1PH, 380V 3PH o Output Frequency (sync to mains): 50 Hzo Waveform Type: Sine wave o Output Connections: 1 x Hard Wire 5-wire (3PH + N + G)

• Inputo Bypass: Built-in Maintenance Bypasso Input Voltage: 380V 3PH



o Input Frequency: 50 Hz o Input Connections: Hard Wire 5-wire (3PH + N + G)

• Batteries & Runtimeo Battery Type: Maintenance-free sealed, leakproofo Backup Time at Full Load: 7 minuteso Hot-swappable

• Communications & Managemento Control panel: status and control console o Audible Alarm: Audible and visible alarms and configurable delayso SNMP management and monitoring with RJ-45 10/100 Base-T Etherneto Emergency Power Off (EPO): Yes

• Warranty: 1 year repair on-site or replace, Start-Up Service

3.10.2 Main and sub-main distribution boards

The main and sub-main distribution boards shall be totally enclosed, dust protected and factory fabricated suitable for operation on 415/240 V, 3 phase, 4 wire, 50 Hz supply.Main and sub-main distribution boards shall comprise main incoming isolator, busbars, moulded case circuit breakers, earth leakage relays, earth bus etc. with ratings and arrangement as shown on the Drawings and all housed in a sheet steel panel fully rust-proofed and electro static powder coated paint; equipped with a hinder door with approved locking device.The main isolator shall be a triple pole and neutral moulded case circuit breaker without tripping element.The busbars shall be high conductivity copper bars to B.S. 159 with ratings as indicated on the Drawings for the three phases and neutral. The busbars shall be arranged and marked to the approval of the Supervisor.The moulded case circuit breakers and earth leakage relays shall be as specified above.The rated service breaking capacity (ICS) of MCCBs shall be 50 KA for MLTP, 28KA for MDBE, 22 KA for MSBs and MCCs, 14 KA for SMSB and MCC fed from MSB unless indicated otherwise on the Drawings.The earth bus shall have adequate rating and length for connecting the incoming and outgoing earth wires or tapes.The distribution boards shall be complete with all necessary internal wiring and connections High conductivity copper bars or rods covered by coloured PVC sleeving for phase identification shall be employed for connections of 200A and higher. For smaller connections PVC insulated cables to B.S. 6231 shall be used with coloured insulation for phase identification.The arrangement of the boards shall be such that the main isolator and MCCBs can be operated when opening the door but to gain access to the MCCBs, cabling and terminations a second cover should be removed. There shall be ample clearance and ample space available inside the boards for cabling and terminations. Adequate clearance shall be maintained between phases and non-current carrying metal and terminals shall be so located that in the final



connected positions there shall be no crowding of wires in close proximity of metal.The boards shall be complete with cable glands for convenient terminations of incoming and outgoing cables. The cable glands shall be so fixed inside the board that ample clearance exists between various feeders.

3.10.3 M.C.B. distribution boards

MCB distribution boards shall comprise of a totally enclosed dust and vermin protected, factory fabricated heavy gauge sheet steel enclosure of 2mm thickness and door of 1.5mm thickness and of ample size with a hinged door and approved fastening device. The enclosure shall contain an isolating switch, adequately rated busbars for phases, neutral connector blocks, earth terminal block and single or triple pole miniature circuit breakers with ratings and arrangement as shown on schedules. DB enclosures shall be suitable for 18 or 24 or 36 SPN ways, has the case may be. HRC fuses shall be provided in MCB Distribution Boards where fault level exceeds 6KA.In corridors DBs enclosure shall be housed in electrical closets. All electrical closets shall be of the same size with architectural finishes as required.All risers falling in areas like corridors or important rooms shall be provided with an hinged access door with finishes as required by architect.The main isolating switch shall be of SPN or TPN air break design. Where indicated on the Drawings, the MCBs for the lighting circuits and socket outlet circuits shall be electrically separated by the provision of separate busbars and each section shall be protected by a separate current operated earth leakage circuit breaker. The RCCB shall afford earth leakage protection for the lighting and power sections. Fuses shall be provided for DBs wherever necessary and/or shown on drawings.The neutral and earth terminal blocks should be provided with arrangement for connecting on each block one cable for each outgoing circuit and one incoming cable of size indicated on the Drawings. The wiring between the RCCB and busbars shall be carried out with coloured PVC insulated cables with copper conductors for phase identification. The arrangement of the enclosure shall be such that the MCBs and COELCB cannot be operated without opening the hinged door but to obtain access to MCBs and COELCB, it should be necessary to remove a second cover. Adequate clearance shall be maintained between phase and non-current carrying metals. Terminals shall be so located that in the final connected positions, there shall be no crowding of wires in close proximity of live metals.MCBs shall be so arranged in the board that it shall be possible to replace a triple pole MCB with three adjacent single pole MCBs or vice versa. The board shall be flush mounted type unless indicated otherwise on the Drawings. Cable glands shall be provided where required.

3.10.3.1 MCB

MCB shall comply with EN60439-3 and shall be symmetrical rail mounted type available in one, two, three or four poles version. They shall be trip free type with quick make, quick break mechanism. The rated ultimate breaking capacity



(Icu) of the MCB’s shall be at least equal to the prospective fault level at the point of the distribution system where they are installed, unless cascaded with an upstream breaker. The minimum rated ultimate breaking capacity (Icu) of the MCB shall be 10 kA if not mentioned on the drawings. MCB can be reverse fed without reduction in performance. Trip setting as indicated on the schedules of points. The MCB shall have thermal overload trip to accept 5% overload and to trip at 30% of rated current as per IEC 947-2. The instantaneous magnetic trip shall operate at 5 to 10 times the rated current for 1P, 2P, 3P or 4P breakers. It shall be possible to replace 3 single phase units with one 3 phase unit. The breakers shall be of current limiting type (DIN type). The quick lag type breakers (QL/plug in type) are not acceptable. Evidence of the ultimate breaking capacity (Icu) shall be produced by test certificates from one of the internationally recognized High Voltage Laboratories (ASTA, CESI, ESEF/ASEFA, KEMA, PEHLA or SATS).The operating mechanism shall be mechanically trip free from the operating handle so as to prevent the contacts from being held closed against short circuit and overload conditions. It shall be “automatic resetting type”. The individual operating mechanism of each pole of a multi pole MCB shall be directly linked within the MCB casing and not by operating handles. The operating handle shall be of the toggle type with possibility of padlocking facility and rotary handle. Each pole shall be provided with bi-metallic thermal element for overload protection and magnetic element for short circuit protection. Current discriminations tables shall be provided for each rating of the breaker. The terminals shall be of the tunnel type (IP 20) in order to minimize the risk of direct contact. It shall be possible to fit on site auxiliaries like shunt trip coil, undervoltage release, ON-OFF switch, alarm switch or residual current device 30 or 300 mA with remote tripping possibility.The term ‘rcb’ /’rcbo’ shall denote an mcb with built-in earth leakage protection.

3.10.3.2 Residual current circuit breaker (RCCB)

RCCB shall comply with CEE 227 or IEC 1008 standards. The RCCB shall provide the functions of isolation, switching and earth leakage protection of electrical circuits.They shall have a residual current operated electromechanical release which operates without auxiliary source of supply to an earth leakage fault between active conductors and earth. RCCBs shall incorporate a filtering device preventing the risk of unwanted tripping due transient voltage. They shall provide a high degree of protection against earth faults, fire hazards and electric shock. RCCBs shall be available in 2 and 4 pole versions with current ratings from 16A to 100A and an earth leakage trip rating as specified in the schedule of points. They shall be suitable for operation on 415V, 3 phase, 4 wire, 50 Hz supply. They shall have an operating temperature from -5 to + 60° C. RCCB shall have a trip indication on the front face by a red mark. It shall be possible to achieve vertical discriminations with RCCBs.RCCB alone shall have a short circuit withstand capacity of 3 KA. RCCB must be protected with short circuit protective devices installed upstream inside the DB



enclosure having appropriate fault level protection.RCCB shall consist of the following mounted in a robust body of all insulated material:

• A current transformer• A tripping coil with contact assembly• Main supply contact• On/Off switch• A test button• A trip free mechanism

Where a RCCB is used a s a separate item and not housed within a distribution or switchboard, it shall be housed in a dust protected enclosure to prevent accidental contact with live terminals.Where contactors are shown in DBs, the distribution board shall deemed to be understood as a multiple section board.All outdoor MCB distribution boards shall be in weatherproof enclosures.The term RCB shall mean an MCB with built-in earth leakage protection similar to‘Quickguard’ of Square-D

3.10.4 Contacors

The contactors shall conform to BS 775, IEC 947-4 suitable for Class II duty and having a making and breaking capacity in accordance with utilization category AC3.Unless specially required otherwise the operating coil shall be rated for 240V 50Hz.Contactors shall be rated for continuous duty.Contactors not forming a part of Distribution Board shall be housed in a purpose made enclosure having appropriate IP rating suitable to the mounting location

3.10.5 Pulse relays

Pulse relays shall be suitable AC or DC operation as per system manufacturer Normal practice. The operation voltage may be 240V 50Hz or 24V DCThe pulse relay shall be suitable for actuation manual through built-in Push button.

3.10.6 Automatic voltage stabiliser

Wherever specified/indicated, the stabilizer shall be constructed on booster transformer principle. The rating of the stabilizer shall be as indicated on drawings or as specified in the B.O.QTechnical Requirements

• Ambient Temp. up to 50 C• Cooling type Natural air cooled• Input 415V AC 15% at 50Hz• Output 415V AC 2% at 50 Hz

The stabilizer shall be equipped with filters for transients, compensator for unbalanced load in 3 phases, protection against faults and malfunctions. The



stabilizer shall be fixed with 3 Ammeters, voltmeters

3.10.7 Circuits and connections

Provide all outgoing circuits with separate compartment and/or screen so that equipment for any one circuit can be maintained without risk of contact with line connections on any other circuit.Connect feeders, for circuits rated upto 63A, to terminal blocks located in separated compartments at top or bottom, conveniently arranged to facilitate termination of cables and suitably identified.For feeders, rated more than 63A, suitably extend copper links rigidly supported and covered with coloured PVC sleeves.Provide all feeders with cable lugs and brass cable glands.Provide removable gland plates suitable for the glands required for the specified cables. Where cables are single core, the gland plates shall be of a non-ferrous metal.Provide all small wiring of stranded copper, not less than 2.5mm2 with PVC insulation to B.S. 6231. Small wiring shall be neatly bunched and cleated in harness form, or shall be enclosed in purpose made plastic trunking or troughing. Wiring cleated to metal surfaces shall be insulated from the metal. Where wiring runs through sheet steel panels, holes shall be grommeted with suitable grommets.Connect small wiring associated with external circuits to terminal strips conveniently arranged.Provide each connection with separate incoming and outgoing terminals with no more than two wires to be connected to any terminal.Wire all spare contacts to terminal strips suitably positioned.Identify all wiring using plastic ferrules at both ends

3.10.8 Flexible conduits

The final conduit/connections to equipment shall be in flexible conduits

3.11 Earthing, bonding and surge protection

3.11.1 Telecommunications

3.11.1.1 Standards

The standards to follow: • ANSI/TIA/EIA-J-STD-607-A: Commercial Building Grounding (Earthing) and

Bonding Requirements for Telecommunications.• ANSI/TIA/EIA-568

3.11.1.2 Other

All metal constructions and frames which are surrounding, supporting or in close proximity of cable installation must be earthed.A dedicated Telecommunications Grounding Busbar (TGB) shall be installed for



connecting systems and equipment in the location served by the equipment room.Every rack cabinet must be connected to the TGB using a dedicated direct link. Chain connecting of the grounding connections is not allowed.

3.11.2 Electrical

3.11.2.1 Standards

• British Standard Code of Practice CP1013 - Grounding.• BS 7671 IEE Wiring Regulations, latest edition.

3.11.2.2 Grounding connection bar

For connection of MV and LV equipment, sub-station shall have high conductivity copper, Grounding connection bar with minimum dimensions of 50 x 6 mm and mounted on porcelain insulators. The bar shall be of suitable length with pre-drilled holes at a minimum distance of 50 mm between hole centres.Grounding connection bars for transformer neutral and LV switchboard frame shall be separate from Grounding bar for HV and transformer frame. Each Grounding connection bar shall have a permanent label to identify the connections together with the wording "Main Grounding Bar".

3.11.2.3 Grounding conductors installation

Standard sizes of stranded copper conductor used for Grounding continuity shall be according to the requirements of IEE Wiring Regulations, 16th Edition.Suitable Grounding facilities, acceptable to the Supervisor, shall be furnished on electrical equipment to consist of compression type terminal connectors bolted to the equipment frame or enclosure and providing a minimum of joint resistance.The conduit system shall not be considered as continuous for Grounding purposes. A separate Grounding conductor shall be installed in the same conduit with the phase and neutral conductors. The separate Grounding conductors shall be sized according to IEE Wiring Regulations, 16th Edition. requirements. No Grounding conductors shall be smaller than 2.5 mm2 unless this is part of a multicore cable. Where flexible connections are made to equipment, Grounding jumpers shall be provided. All connections of heavy gauge steel conduit system shall be checked for good electrical continuity.Exposed conductors shall be installed inconspicuously in vertical or horizontal positions on supporting structures. When located on irregular supporting surfaces or equipment, the conductors shall run parallel to or normal to the dominant surface.Conductors routed over concrete, steel or equipment surfaces shall be kept in close contact with those surfaces by using fasteners located at intervals not exceeding 1 m.Exposed Grounding conductors shall be securely fastened to the mounting surface using copper or brass straps.



Clamps, connectors, bolts, washers, nuts and other hardware for bolted connection to Grounding system shall be of copper.Exothermic welds shall comprise moulds, cartridges, materials, and accessories as recommended by the manufacturer.The Grounding conductors entering the building shall be installed in a 25 mm diameter PVC conduit. Waterproofing shall be provided at all entry of Grounding conductors, details of which shall be approved by the Supervisor.Grounding conductors shall be buried at a minimum depth of 750 mm below finished grade.Underground conductors shall be buried in clean sifted Grounding. Except for sub-stations and electric rooms, the exposed Grounding conductor shall run in protective pipes for runs below 900 mm from floor level. Pipe shall also be provided at locations where conduct is likely to be subject to physical damage.Extensions from Grounding loop as shown on the Drawings shall be provided for connection to electrical equipment. Connect the Grounding conductor to the equipment, Grounding bus, pad or lug. In addition to the Grounding grid extension conductors, an Grounding cable to each end of the Grounding bus in each assembly of power distribution board or panel boards shall be provided.Where an Grounding conductor is included with the phase conductors of power circuits, the Grounding conductor shall be connected to the equipment Grounding facilities and to the source Grounding bus. Where an grounding conductor is not included with the phase conductors, the equipment shall be Grounded by connecting a separate Grounding cable to the equipment Grounding facilities and to the tray Grounding cable or source Grounding bus. Except where otherwise shown on the Drawings, integral parts of a cable assembly shall be sized in accordance with the requirements of IEE Wiring Regulations, 16th Edition.

3.11.2.4 Building systems grounding

The building low current systems including communication, control and alarm functions…etc shall be provided with Grounding as shown on the Drawings and in relevant specifications. The installation of the Grounding for building systems shall be in accordance with the recommendations of standards, and the applicable provisions of this section.

3.11.2.5 Supplementary and equi-potential bonding

In accordance with Section 547 of the IEE Wiring Regulations 16th edition (BS 7671) bonding conductors shall be installed in appropriate locations to ensure all simultaneously accessible exposed or extraneous conductive parts are at equal potential. Undertake such tests and install such supplementary bonding conductors that are necessary to ensure compliance with these requirements.Supplementary bonding conductors shall conform to the requirements of Section 547-03 of the IEE Wiring Regulations and shall have a minimum cross-sectional area of 2.5 mm2 where mechanically protected and 4.0 mm2 where not so protected.



Main equi-potential bonding conductors shall conform to the requirements of Section 547-2 of the IEE Wiring Regulations and shall have a minimum cross-sectional area of 6.0 mm2.

3.11.2.6 Field quality control

Grounding resistance tests shall be carried out after installation of the individual Grounding systems in accordance with the Specifications. The Grounding resistance tests shall be carried out in accordance with Section 713-11 of the IEE Wiring Regulations 16th edition and readings obtained officially recorded by all witnessing parties.Prior to connection of Grounding rods to the Grounding system, the Grounding resistance of individual Grounding rod shall be measured by using an approved type of Grounding resistance tester.After completion of all the connections of Grounding system, the Grounding resistance shall be measured from the Grounding test point in presence of the Supervisor.All the Grounding resistance test reports shall be submitted for Supervisor’s approval.The presence of the electrode shall be indicated in English and Arabic.

3.12 Fire stopping

Room penetrations (sleeves, horizontal and backbone pathways) to be properly firestopped. Under no circumstances should any fire stopping material (for example paint, foam) come into contact with cables. This may invalidate the performance warranty of the installed cable and cause issues with future maintenance and expansion.It should be emphasized that the installer (personnel and organization) are liable both financially and criminally for failure to follow proper firestopping procedures.

3.12.1 Sealing (fire barrires)

Fire resisting caulking compound for sealing trays, trunking, conduits, cables, ducts, pipes and sleeves shall be of a putty like consistency workable with hands. All materials for caulking and sealing shall be approved by Civil Defense wherever applicable.

3.13 Administration

Administration includes• Labeling• Plans• Other resources needed for efficient management of the

telecommunications installation

3.13.1 Telecommunications labeling

Labeling is done following the ANSI/TIA/EIA-606-A standard. The Contractor shall obtain the detailed instructions at the time of installation.



Labels must be mechanically printed and not written by hand. Label identifiers must not include letters “O” and “I” as these can be confused with numbers.

3.13.1.1 Backbone cable labeling

3.13.1.1.1 Backbone between buildings

The cable must be labeled at 30 cm of each end of the cable.The identifier on the label must be double printed on the label so it will be visible from opposite sides of the cable.The syntax is : fs-an/fs-anWhere:f: the building number “D00”

D: is the police district code as defined in a separate document00: is the building number in the district,

s: the telecommunication space “A”A: the telecommunication space at that building,

a: patch panel row alpha charactern: the two digit number in the patch panel row

3.13.1.1.2 Backbone inside buildings

The cable must be labeled at 30 cm of each end of the cable.The identifier on the label must be double printed on the label so it will be visible from opposite sides of the cable.The syntax is : fs-an/fs-anWhere:f: the building number “D00”

D: is the police district code as defined in a separate document00: is the building number in the district,



3.13.1.2 Horizontal cable labeling

The cable must be labeled at 30 cm of each end of the cable.The identifier on the label must be double printed on the label so it will be visible from opposite sides of the cable.The syntax is : fs-an/rFmWhere:fs-an: the patch panel where the cable originates:

f: the building number “D00”D: is the police district code as defined in a separate document00: is the building number in the district,


a: patch panel row alpha character



n: the two digit number in the patch panel rowrFm: the label of the faceplate set where the cable terminates:

r: two digit number represents the floor number,F: capital letter “F”,m: three digit number represents the set number.

3.13.1.3 Work area labeling

3.13.1.3.1 Labeling the faceplate sets in the work area

The label must be on the top of the faceplate.Labeling the faceplate sets syntax is: rFmWhere:r: two digit number represents the floor number,F: capital letter “F”,m: three digit number represents the set number.

3.13.1.3.2 Labeling the sockets in the work area:

The syntax is: fs-anWhere:fs-an: the patch panel where the cable originates:

f: the building number “D00”D: is the police district code as defined in a separate document00: is the building number in the district,



3.13.1.4 Patch panel labeling

Each row one unique alpha character: A, B, …, Z, excluding letters O and I. Label of the row must be on the left side of the row. After Z, next label will be AA.Each port two digit numerical character: 01, 02, 03, …, 99. The port number must be on the top of the port exactly, if not labeled by the manufacturer.

3.13.1.5 Telecommunications equipment rooms

Telecommunications room must be labeled as following. The label must be on the outside of the door under the room number label.The syntax is: Telecommunications room fsWhere:

f: the building number,s: the telecommunication space,

Inside the room must be a sheet (A4) with the following information:• District (name and code)• Building (name and code)• Floor (number)



• Room (number)• telecommunications room label• short description of the site (nodes, floors, ip addresses: subnet, servers,

gw, wan etc, special notes, proxy, etc)Next to the information sheet must be a box where the following is kept:

• copy of the project handover folder

3.13.2 Electrical labeling and identification

3.13.2.1 General

Electrical identification to identify all electrical items for easy operation and maintenance including, but not limited to the following:

1. Nameplates and labels.2. Wire markers.3. Colour coding of raceways.4. Circuit identification charts.5. Cable identification tags.6. Cable warning tapes.7. Cable markers.8. Equipment warning/danger signs.

The Arabic and English languages shall be used for all labeling and charts.

3.13.2.2 Standards

• IEC 364 Electrical Installations• BS 7671 Electrical Wiring Regulation (IEE 16th)• IEC 391 Marking of Insulated Conductors• IEC 445 Equipment Terminals (Identification of Equipment Terminals

and Terminations of Certain Designated Conductors).• IEC 446 Identification of Bare Conductors by Colors or Numerals.

3.13.2.3 Products

3.13.2.3.1 Label and identification

Each item of the electrical installation including electrical switchgear, control gear etc. shall be fitted with a non-corrodible label clearly indicating its function, circuit number and phase.Each label shall be made of white plastic not less than 50mm x 12mm high suitably engraved with black 5mm high letters and fixed by means of two brass set screws, nuts, and shake proof washers.Warning labels made of red plastic with white letters at least 12mm high reading "DANGER 220 VOLTS" as appropriate shall be fixed to the lids, covers or doors of any equipment which contains terminals or conductors connected to more than one phase of a low voltage supply. The method of fixing shall be as detailed above.Prior to final testing the Contractor shall confirm that all labeling is intact over the whole site and that all cables have been fitted with circuit markers.



All conductors shall have their outer covering colored to suit the phase to which they are connected.An instruction notice giving details of first aid treatment for electric shock shall be positioned in an approved position in each switch room. Manufacturer's or Contractor's names or trademarks shall not be exhibited anywhere through the installation without the prior approval and permission of the Supervisor with exception that the Contractor's name and address may be fixed in an approved position on the main intake switchboard.All labels shall be in English and Arabic.

3.13.2.3.2 Nameplates and labels

Nameplates and labels shall be engraved on a three-layer 2 traffolyte plate having minimum thickness of 2 mm, securely screwed to the housing and have black letters on white background in Arabic and English.The name plates and labels shall be required for each electrical distribution board, control panels, equipment enclosures, substation equipment, disconnect switches and equipment cabinets.Lettering shall be block capitals standing :

• 6 mm high for identifying individual equipment and loads.• 10 mm high for identifying grouped equipment and loads.

Labels using embossed adhesive tape with 6mm white letters on black background or transparent adhesive tape with 6 mm black letters, as selected by the Supervisor, shall be used for identification of individual wall switches, receptacles, low current outlets, speakers, control device stations, junction/pull boxes, electrical boxes and fittings, etc.

3.13.2.3.3 Wire markers

Wire markers shall be split sleeve or tubing type.The wire markers shall be required for each conductor at panelboard gutters, pull boxes, outlets, junction boxes and each load connection.All power and lighting circuits, branch or feeder circuits and control circuits shall require wire markers.

3.13.2.3.4 Colour coding of raceways

Provide color bands with printed description of each system, minimum 75 mm wide for all cable trays/ladders and trunking runs. These color bands shall be applied at each electrical distribution/panel board, low current system control panels and junction box locations and at 15 m centers within an area.Provide color bands with printed description of each system, minimum 25 mm wide for conduits up to 25 mm in diameter and one-half the conduit diameter for larger conduits, applied at panel and pull box locations, within each room, and at 6 m centers within an area.Following color banding shall be used for the raceways of various electrical systems, however subject to final decision of the Supervisor. Color bands for the electrical systems not described here shall be as agreed on site:

• Normal Power: brown.• UPS Power: black



• Earthing: green.• Data (includes telephone): blue.• Television: rust.

3.13.2.3.5 Circuit identification charts

Individual circuit identification charts shall be provided for all panelboards, distribution boards, control panels, etc. giving following information as a minimum.

• Circuit numbers• Phase• Load names with location.• Connected load.• Outgoing terminal numbers.• Sizes and types of protective devices.• Sizes and types of incoming and outgoing cables.• Contacts location references of relays and other control devices (if any).

Charts shall be typed on A4 size sheets. They shall be enclosed in a clear plastic envelope and shall be securely fixed to the inside cover of the unit. Additional copies of the charts shall be included in the Operation and Maintenance Manuals.

3.13.2.3.6 Cable identification tags

All cables which exit from manholes, vaults, handholes, and transformer or switch enclosures shall be properly tagged or labeled. Tags shall be permanent, non-corrodible and clearly readable. Tags should include the information listed below for the various circuit categories:

• Feeder Name• Voltage• Phase (for single conductor cables)

Cable identification tags for wire and cable circuits shall be of an opaque nylon material arranged to include a marker plate, non-releasing nylon ties, and cable fastening tail. One side shall be roughened to hold black nylon permanent ink. Identification shall be permanent and waterproof. The holding device shall be designed to allow the fastening tail to pass around the cable through the holding device, and prevent removal of the tail without cutting it loose from the marker. Cable identification shall be inscribed in Arabic and English.

3.13.2.3.7 Cable warning tapes

For buried LV and HV cables use warning tapes according to the standard practice of Electricity Supply Authority and applicable international standards.Cable warning tapes shall be of polythene, not less than 150 mm wide and at least 0.25 mm thick. They shall be yellow in color for LV and MV cables and bear the continuously repeated legend – “CAUTION ELECTRIC CABLE BELOW” or similar in English and Arabic, in black letters not less than 30 mm high.For buried low current/communication cables or duct banks, use warning tapes as per the standard practice of Local Telecom Supplier and applicable international standards.



3.13.2.3.8 Cable markers

Buried cables shall be permanently identified by concrete markers. The markers shall be 600 mm square x 100 mm thick with impressed character; they shall be made of grade 20 concrete, with 10 mm aggregate. The impressed characters shall be in English and Arabic and worded "HV CABLE" or "LV CABLE" as appropriate together with circuit details as required for proper identification. In addition, the word “JOINT” shall be added to above words, where applicable.Except where cables are buried, located in switchrooms, in ducts and spaces designated solely for electrical services, or have orange oversheaths; they shall be identified by adhesive bands colored orange, complying with standards and codes of practice mentioned elsewhere in the Specifications. The bands shall be not less than 100 mm long, located at least once within each separate compartment through which cables pass and at intervals not exceeding 12 m.Except where cables are buried or enclosed in conduit, trunking or ducting; they shall be permanently identified by discs. The discs shall be of laminated plastic materials with black character on white; character shall be not less than 3 mm high. The inscription shall indicate the nominal voltage, the designation of the load, the number and cross sectional area of cores and the rated voltage of the cable.Cables identification discs shall be attached to the cables with ties. Disc shall be located within 500 mm of terminations and joints, at least once within each separate compartment through which the cable passes, and at intervals not exceeding 24 m, they shall coincide with the colour bands.

3.13.2.3.9 Equipment warning/danger signs

For external use, pressure sensitive danger signs shall be used. Dimensions shall be as approved by the Supervisor. The signs shall be heavy duty vinyl with a self-adhesive backing which can be applied to curved or irregular surfaces. Danger signs shall be weather-resistant and shall not discolor or deteriorate with age.Danger signs shall be inscribed with the equipment voltage level along with an internationally recognized danger sign.Warning/Danger signs made of red plastic (vinyl) with white letters at least 25 mm high reading "DANGER High Voltage" shall be fixed to the entrance doors of all 11 kV switchgear and transformer rooms.Warning/Danger signs made of red plastic (vinyl) with white letters at least 15 mm high reading "DANGER 380V"or “DANGER 220V” as appropriate, shall be fixed to the lids, covers or doors of any equipment which contains terminals or conductors connected to more than one phase of a low voltage supply. All signs shall be in English and Arabic.

3.13.2.4 Administration labeling

3.13.2.4.1 Labeling the Boards

1. Main Board: The board which is connected to main source of power



(electricity company) 2. Sub-Main Board : The board which supplies the distribution boards ( may

be more than one Sub-Main board) and connected to main board. 3. Distribution Board: The board which supplies the sockets (may be more

than one distribution board) and connected to sub-main board.

3.13.2.4.1.1 Main Board

The syntax:rrMAINxWhere:rr: two digit number represents the floor number where the main board is located. MAIN: fixed ward (main) with capital letters.x: one digit number represents the sequence number of the main boards , not needed if there is only one main board.

3.13.2.4.1.2 Sub-Main Board

The syntax:rrS-MAINy/rrMAINx/HggWhere:rr: two digit number represents the floor number where the sub-main board is located.S-MAIN: fixed ward (s-main ) with capital letters.y: one digit number represents the sequence number of the sub- main boards , not needed if there is only one sub- main board.rrMAINx: the label of the main board.Hgg: the circuit breaker in the main board belong to the sub-main board.

3.13.2.4.1.3 Distribution Board

The syntax:rrD-BOARDz/rrS-MAINy/HggWhere:rr: digit number represents the floor number where the distribution board is located.D-BOARD: fixed ward (d-board) with capital letters.z: one digit number represents the sequence number of the distribution boards , not needed if there is only one distribution board.rr.S-MAINy: the label of the Sub-Main board.Hgg:the circuit breaker in the sub-main board belong to the distribution board.

3.13.2.4.1.4 Circuit Breakers

Each row will get one unique alpha character A,B,…..,Z excluding letters O and I , this must be on the left side of the row.Each Circuit Breaker will be identified by a two digit number sequentially from left to right.The syntax:Hgg



Where:H: is the raw.gg: the circuit breaker number.This must be done for power board and UPS board separately and for all board.

3.13.2.4.1.5 Faceplate set

The label must be on the top of the faceplateThe syntax:rrFm-rrD-BOARDzWhere:rr: two digit number represents the floor number where the faceplate is located.F: capital letter F.m: three digit number represents the set number in the floor.rrD-BOARDz:the label of the distribution board.

3.13.2.4.1.6 Sockets

3.13.2.4.1.6.1 The main socket connected directly to the board

The syntax is rrFm1/xxxxxxxx-Hgg Where: rrFm1 is the label of the set itself

xxxxxxxx: word POWER if the socket for power, word UPS if the socket for UPS.

Hgg: the label of the circuit breaker.

3.13.2.4.1.6.2 The sockets connected to the other sockets

The syntax is: rrFm2/rrFm1/Hgg Where: rrFm2 : the label of the set itself .

rrFm1: the label of the main set connected directly to board . Hgg: the circuit breaker to which the socket belongs.

3.13.2.5 Installation

3.13.2.5.1 Preparation

De-grease and clean surfaces to receive nameplates and labels.


Install warning and descriptive labels as follows :1. Metallic surfaces using stainless steel or chromium plated bolts and/or

self tapping screws.2. Concrete surfaces or masonry walls using and brass wood screws.3. Timber surfaces using minimum 6 mm countersunk brass screws.4. All insulated enclosures using an approved plastic welding adhesive.

The danger sign and identification number shall be affixed to the front or



access doors of all transformers and switches. For equipment with two doors the danger sign shall be mounted on the left door with the identification number mounted on the right door. Both the danger sign and the identification number shall be centered 300 mm below the top edge of the doors and on the vertical centerline of each door. On equipment with only one access door, the danger sign and the identification number shall be centered on the vertical centerline of the door, with the horizontal centerline of the danger sign 300 mm below the top edge of the door and the horizontal centerline of the identification number 250 mm below the danger sign centerline.Locate cable markers at every point where cable(s) enter a building, sub-station, distribution/feeder pillar; at each joint, change of direction, road/pathway crossing, etc. Cable markers shall also be provided along the straight runs (route) of the cable(s) at the interval not exceeding 30 m.

3.13.3 Plans, drawings and diagrams

3.13.3.1 Issuing the drawings

Building layout plans will be issued to the Contractor by the Supervisor.

3.13.3.2 Design and as installed drawings

The Contractor shall supply the drawings showing:• routing of the pathway system, including ductbanks and maintenance

holes• duct contents indicating cable assignments• including sections and elevations and showing positions of major

components position and method of fixing and terminating cables• floor drawings showing cable routes and method of laying, spacing and

space factor applied• cabinet layouts• equipment rooms layouts• labeling

The drawings shall be supplied as CAD drawing in AutoCad format with each on the separate layer:

◦ Telecommunication▪ outlets▪ containment routes

◦ Electrical▪ outlets▪ containment routes

◦ Equipment, telecommunications rooms layouts◦ Earthing

Cabinet schematics shall be in Visio or AutoCad formats.In case of multi-building installation, also the site plan must be supplied with the routes, transition points and cable types marked.In addition to the drawings, photos of the following shall be supplied:

• Entrance facilities



• Transition points• Backbone risers• Rack cabinets• Telecommunications rooms• Outlets

Both electronic and paper copies shall be supplied. Paper copies of drawings shall be printed to the scale of 1:100.

3.14 Testing

The entire cable installation must be tested and certified in compliance with the applicable standards.100% of the installed links shall be tested, including cables, termination, sockets, patch panels, distribution boards, etc.Installed systems must pass the requirements of the standards applicable and as further detailed below. Any failure must be diagnosed and corrected. The corrective action shall be followed with a new test to prove that the requirements are met after the corrective actions. The final and passing result of the tests for all links shall be provided in the test results documentation.The Contractor shall supply all instruments and tools required for performing the tests.The Contractor shall repeat any tests in the presence of the local authorities, in case such requirement exists.When equipment or services of a specialized nature are involved, and if it was found necessary, provide the services of a specialist from the manufacturer who shall be present at the time of testing and commissioning of this equipment. All expenses for this shall be included and no claim for additional payment will be entertained.

3.14.1 Purpose of testing

To verify the installed systems are performing in accordance with the specifications.

3.14.2 Witness testing

There shall be a witness testing of 15% of all installed outlets/links. If during this 15% witness test, a failure is found, a full 100% test of all installed links shall be conducted.

3.14.3 Category 6 Permanent Link

3.14.3.1 References and requirements

TIA/EIA-568-B.1 Commercial Building Telecommunications Cabling Standard Part 1: General Requirements, Sections 4, 6, 7, 8, and 10TIA/EIA-568-B.2-1 Transmission Performance Specifications for 4-Pair 100 ohm Category 6 Cabling, Sections 5, 6, and 7, Transmission Performance, Frequency Range of 1 MHz to 250 MHz, Annex A Cabling (Field) Measurement Procedures and Annex B Test Instruments (Class 3 Testers)



TIA standards help ensure a minimum level of performance for a cabling component or an entire system, and it is the Contractors obligation to comply with those standards. Permanent link testing is needed for the following parameters:

• A Attenuation• NEXT Near-End Crosstalk• ACR Attenuation to Crosstalk Ratio• RL Return Loss• PSNEXT Power Sum Near-End Crosstalk• PSACR Power Sum Attenuation to Crosstalk Ratio• ELFEXT Equal Level Far-End Crosstalk• PSELFEXT Power Sum Equal Level Far-End Crosstalk

3.14.3.2 Testing instructions – Category 6 Permanent Link

Testing shall be performed using a Level 3 Field Tester to ISO/IEC 11801 Issue 2. Which shall be a Fluke DSP 4300 or Fluke DTX.Every cabling link in the installation shall be tested in accordance with IEC 61935.The installed twisted-pair horizontal links shall be tested from the floor distributor in the telecommunications room to the telecommunication outlet in the work area against the “Permanent Link” performance limits specification as defined in ISO/IEC 11801 2000.The test equipment (tester) shall comply with or exceed the accuracy requirements for enhanced level III field testers.The tester shall be within the calibration period recommended by the vendor in order to achieve the vendor-specified measurement accuracy.The tester interface adapters must be of high quality and the cable shall not show any twisting or kinking resulting from coiling and storing of the tester interface adapters. In order to deliver optimum accuracy the permanent link interface adapter for the tester shall be calibrated to extend the reference plane of the Return Loss measurement to the permanent link interface.The Pass or Fail condition for the link-under-test is determined by the results of the required individual tests. Any Fail or Fail* result yields a Fail for the link-under-test.In order to achieve an overall Pass condition, the results for each individual test parameter must Pass or Pass*.A Pass or Fail result for each parameter is determined by comparing the measured values with the specified test limits for that parameter. The test result of a parameter shall be marked with an asterisk (*) when the result is closer to the test limit than the accuracy of the field tester.

3.14.3.3 Performance Test Parameters

The test parameters are defined in TIA/EIA-568-B.2-1.The test of each Category 6 link shall contain all of the following parameters as detailed below. In order to pass the link test all measurements (at each frequency in the range from 1 MHz through 250 MHz) must meet or exceed the limit value determined in the above-mentioned Category 6 standard.



Each parameter shall be measured from 1 through 350 MHz and all of these measurement points are to be recorded in the test results information.

3.14.3.3.1 Wire Map

Wire Map shall report Pass if the wiring of each wire-pair from end to end is determined to be correct. The Wire Map results shall include the continuity of the shield connection if present.

3.14.3.3.2 AC Wire Map

AC Wiremap validates twisted-pair cabling for Power over Ethernet services in accordance with TIA/EIA standards.

3.14.3.3.3 Length

The field tester shall be capable of measuring length of all pairs of a permanent link or channel based on the propagation delay measurement and the average value for NVP. The physical length of the link shall be calculated using the pair with the shortest electrical delay. This length figure shall be reported and shall be used for making the Pass/Fail decision. The Pass/Fail criteria are based on the maximum length allowed for the permanent link configuration (90 meters) or the channel (100 meters) plus 10% to allow for the variation and uncertainty of NVP.

3.14.3.3.4 Insertion Loss (Attenuation)

Insertion Loss is a measure of signal loss in the permanent link or channel. The term ‘Attenuation’ has been used to designate ‘insertion losses. Insertion Loss shall be tested from 1 MHz through 350 MHz in maximum step size of 1 MHz. It is preferred to measure attenuation at the same frequency intervals as NEXT Loss in order to provide a more accurate calculation of the Attenuation-to-Crosstalk Ratio (ACR) parameter.Minimum test results documentation (summary results): Identify the worst wire pair (1 of 4 possible). The test results for the worst wire pair must show the highest attenuation value measured (worst case), the frequency at which this worst-case value occurs, and the test limit value at this frequency.

3.14.3.3.5 NEXT Loss, pair-to-pair

Pair-to-pair near-end crosstalk loss (abbreviated as NEXT Loss) shall be tested for each wire pair combination from each end of the link (a total of 12 pair combinations). This parameter is to be measured from 1 through 350 MHz. NEXT Loss measures the crosstalk disturbance on a wire pair at the end from which the disturbance signal is transmitted (near-end) on the disturbing pair. The maximum step size for NEXT Loss measurements shall not exceed the maximum step size defined in the standard.Minimum test results documentation (summary results): Identify the wire pair combination that exhibits the worst case NEXT margin and the wire pair combination that exhibits the worst value of NEXT (worst case). NEXT is to be measured from each end of the link-under-test. These wire pair combinations



must be identified for the tests performed from each end. Each reported case shall include the frequency at which it occurs as well as the test limit value at this frequency.

3.14.3.3.6 PSNEXT Loss

Power Sum NEXT Loss shall be evaluated and reported for each wire pair from both ends of the link-under-test (a total of 8 results). PSNEXT Loss captures the combined near-end crosstalk effect (statistical) on a wire pair when all other pairs actively transmit signals. Like NEXT this test parameter must be evaluated from 1 through 350 MHz and the step size may not exceed the maximum step size defined in the standards as above.Minimum test results documentation (summary results): Identify the wire pair that exhibits the worst-case margin and the wire pair that exhibits the worst value for PSNEXT. These wire pairs must be identified for the tests performed from each end. Each reported case shall include the frequency at which it occurs as well as the test limit value at this frequency.

3.14.3.3.7 ELFEXT Loss, pair-to-pair

Pair-to-pair FEXT Loss shall be measured for each wire-pair combination from both ends of the link-under-test. FEXT Loss measures the unwanted signal coupling (crosstalk disturbance) on a wire pair at the opposite end (far-end) from which the transmitter emits the disturbing signal on the disturbing pair. FEXT is measured to compute ELFEXT Loss that must be evaluated and reported in the test results. ELFEXT measures the relative strength of the far-end crosstalk disturbance relative to the attenuated signal that arrives at the end of the link. This test yields 24 wire-pair combinations. ELFEXT is to be measured from 1 through 350 MHz and the maximum step size for FEXT Loss measurements shall not exceed the maximum step size defined in the standard above.Minimum test results documentation (summary results): Identify the wire pair combination that exhibits the worst-case margin and the wire pair combination that exhibits the worst value for ELFEXT. These wire pairs must be identified for the tests performed from each end. Each reported case shall include the frequency at which it occurs as well as the test limit value at this frequency.

3.14.3.3.8 PSELFEXT Loss

Power Sum ELFEXT is a calculated parameter that combines the effect of the FEXT disturbance from three wire pairs on the fourth one. This test yields 8 wire-pair combinations. Each wire-pair is evaluated from 1 through 350 MHz in frequency increments that do not exceed the maximum step size defined in the standards as shown in above. Minimum test results documentation (summary results): Identify the wire pair that exhibits the worst-case margin and the wire pair that exhibits the worst value for PSELFEXT. These wire pairs must be identified for the tests performed from each end. Each reported case shall include the frequency at which it occurs as well as the test limit value at this frequency.



3.14.3.3.9 Return Loss

Return Loss (RL) measures the total energy reflected on each wire pair. Return Loss is to be measured from both ends of the link-under-test for each wire pair. This parameter is also to be measured form 1 through 350 MHz in frequency increments that do not exceed the maximum step size defined in the standard.Minimum test results documentation (summary results): Identify the wire pair that exhibits the worst-case margin and the wire pair that exhibits the worst value for Return Loss. These wire pairs must be identified for the tests performed from each end. Each reported case shall include the frequency at which it occurs as well as the test limit value at this frequency.

3.14.3.3.10 ACR (Attenuation to crosstalk ratio)

ACR provides an indication of bandwidth for the two wire-pair network applications. ACR is a computed parameter that is analogous to ELFEXT and expresses the signal to noise ratio for a two wire-pair system. This calculation yields 12 combinations – six from each end of the link.Minimum test results documentation (summary results): Identify the wire pair combination that exhibits the worst-case margin and the wire pair combination that exhibits the worst value for ACR. These wire pair combinations must be identified for the tests performed from each end. Each reported case shall include the frequency at which it occurs as well as the test limit value at this frequency.

3.14.3.3.11 PSACR

The Power Sum version of ACR is based on PSNEXT and takes into account the combined NEXT disturbance of all adjacent wire pairs on each individual pair. This calculation yields 8 combinations – one for each wire pair from both ends of the link.Minimum test results documentation (summary results): Identify the wire pair that exhibits the worst-case margin and the wire pair that exhibits the worst value for PSACR. These wire pairs must be identified for the tests performed from each end. Each reported case shall include the frequency at which it occurs as well as the test limit value at this frequency.

3.14.3.3.12 Propagation Delay

Propagation delay is the time required for the signal to travel from one of the link to the other. This measurement is to be performed for each of the four wire pairs.Minimum test results documentation (summary results): Identify the wire pair with the worst-case propagation delay. The report shall include the propagation delay value measured as well as the test limit value.

3.14.3.3.13 Delay Skew

This parameter shows the difference in propagation delay between the four wire pairs. The pair with the shortest propagation delay is the reference pair with a delay skew value of zero.



Minimum test results documentation (summary results): Identify the wire pair with the worst-case propagation delay (the longest propagation delay). The report shall include the delay skew value measured as well as the test limit value.

3.14.3.4 Test Result Documentation

The test result information for each link shall be recorded in the memory of the field test equipment upon completion.The test result records saved by the test equipment shall be transferred into a Windows or Linux based database utility that allows for the maintenance, inspection and archiving of these test records.The database for the completed job shall be stored and delivered on CD-ROM; this CD-ROM shall include the software tools required to view, inspect, and print any selection of test reports.A paper copy of the test results shall be provided that lists all the links that have been tested with the following summary information:

• The overall Pass/Fail evaluation of the link-under-test including the NEXT Headroom (overall worst case) number

• The date and time the test results were saved in the memory of the tester

General Information to be provided in the electronic database with the test results information for each link:

• The identification of the customer site as specified by the end-user• The identification of the link in accordance with the naming convention

defined in the overall system documentation• The overall Pass/Fail evaluation of the link-under-test• The name of the standard selected to execute the stored test results• The cable type and the value of NVP used for length calculations• The date and time the test results were saved in the memory of the

tester• The brand name, model and serial number of the tester• The identification of the tester interface• The revision of the tester software and the revision of the test standards

database in the testerThe test results information must contain information on each of the required test parameters that are listed above.The detailed test results data to be provided in the electronic database for each tested link must contain the value measured at every frequency during the test for each of the frequency-dependent test parameters.PC-resident database program must be able to process the stored results to display and print a colour graph of the measured parameters.

3.14.4 Electrical cables

The cables shall be factory tested in accordance with the applicable standards, codes or recommendations.After completion of the installation of wires and cables including clamping, end preparation, jointing, etc., but before termination on either end, the insulation



resistance test (meager test) shall be carried out for all types of wires and cables with 500V or 1000V meager as applicable according to the rated voltage of the cable insulation and as per the IEE Wiring Regulations, 16th Edition.For each cable type, the following test certificates, providing tests have been carried out shall be submitted to the Supervisor for approval.

• Mechanical properties of insulation and sheathing components.• Resistance to cracking.• Pressure test at high temperature.• Resistance to flame propagation.

Final tests shall be made at site and the following routine tests will be carried out :

• Conductor resistance test.• Insulation resistance.

3.14.4.1 General

The testing of all electrical equipment shall include, but not be limited to, the items below. This shall be in addition to testing specified elsewhere in this specification.

1. General Equipment check.2. Field wiring and ground system verification.3. Conductor insulation tests.4. Equipment adjustment.

The Contractor shall be responsible to make arrangements for power required for testing and commissioning purpose. The testing shall be a continuous process to maintain the construction schedule to the satisfaction of the Supervisor. The Supervisor shall have full access to observe all facets of the testing. All terminals, connections and attachments, all covers, insulating fittings, supports, hardware and field mounted accessories shall be checked for proper tightness.

3.14.4.2 Cable

Testing of all cable furnished and installed under this specification shall be in accordance with all related sections.

3.14.4.3 Grounding

Testing and grounding of equipment and cable, shall include, but not be limited to the tests below:

• Earth continuity tests shall be made from each item of equipment to the appropriate main ground system and on the main ground system to the ground rods.

• The resistance to ground for selected ground rods:All ground resistance measurements shall be made with a three terminal “megger” type ground tester which applies alternating current to the electrodes and which gives a reading in direct current ohms. Two reference ground probes shall be used and all tests shall be made in accordance with the instrument manufacturer’s instructions for ground resistance testing. Prior to connection of ground rods to the grounding system the Contractor shall obtain



individual measured ground resistance data from selected ground rods as indicated on the drawings. These data shall be obtained, identified, and recorded under the supervision of the Supervisor and the results sent to the Supervisor within five days.After connection of ground rods to each manhole’s grounding mat, the Contractor shall obtain a ground resistance measurement from a flush ground plate. These data shall be obtained, identified, and recorded and the results sent to the Supervisor within five days.The ground resistance measurement data may indicate that additional ground rods are required. The Contractor shall furnish, install, and connect additional ground rods as the Supervisor may direct.

3.14.4.3.1 Operation Control

The Supervisor will establish a system of operation control as the permanent equipment and systems are completed and capable of energization.The system will consist of placing appropriate tags on each item of equipment and each system component indicating its current status and requiring mandatory clearances from designated personnel to operate, energize or remove from service the equipment or systems. The controls established will encompass the following phases:

1. Equipment or systems completed to the point where they may be energized, pressurized or operated but not yet checked out will be tagged and the sources of power or pressure will be turned off and tagged. The affected components shall not be operated without clearance.

2. Following initial operation of the equipment or system, tagging will be performed as in 1 and the affected components shall be operated only by the personnel designated by the Supervisor.

3. Equipment and systems released for service will be so tagged. Only the personnel so designated by the Supervisor shall operate or remove from service such systems or equipment. When a request to remove from service is made, all controls and sources of power or pressure will be tagged out and shall be operated under any circumstances. Only the personnel originally tagging the system shall clear the system from service.

The Supervisor will establish the procedures and details of the operation control system. All notification of status and requests for clearances for operations shall be made to the Supervisor. The procedures established shall be followed.

4 Project handover folderThe form of the reporting documentation shall be as follows, including all the sections:

4.1 Paper handover information

i.Title page



Title page shall contain the following:• text “Technical manual for the telecommunications cabling for the

Palestinian Civil Police”• Project name, name of the building, address of the building• Photographic image of the building facade• Name, address and telephone number of the Contractor• Date of handover

i.Table of contents• A list of enclosed sections.

ii.System description• A brief overview of the project and its elements.

iii.Drawings, Diagrams & images• All requested drawings and diagrams as detailed in this document or

defined in the detailed design statement which will include CAD floor plans, JPEG Images of all equipment rooms, rack cabinets, backbone pathways, cabling systems and other required.

iv.Equipment rooms• All requested details and drawings detailing all Equipment and

telecommunications rooms.v.Specification (data) sheets

• As defined in the section “General: Specifications”vi.Setting up, commissioning and operating instructionsvii.Trouble shooting proceduresviii.Test results, compliance certificates

• Summaries of all test results, Power, noise and light source test results and voice continuity test results. Any electrical work carried out by the retained company or its approved sub Contractors shall also be supplied with a proper test certificate.

ix.Warranty• Warranty statements.

x.Method statements• Method statements of all works carried out by the Contractor.

xi.Quality assurance plan• Quality Assurance Plan of the Contractor.

xii.Maintenance procedures• Any maintenance procedures that need to be carried out on the works

installed by the Contractor in order to keep within the warranty conditions.

• Maintenance instructions including schedules for preventative maintenance

xiii.Spare parts• Complete recommended spares list including manufacturers name and

catalog number.• Spare parts obtaining procedure.

xiv.Fault callout procedure• A detailed statement defining fault reporting and warranty claim

procedures.



4.2 Electronic handover information

As part of the handover folder the retained company shall provide a CD, formatted to allow reading in conventional read only drives, containing the electronic copy of all the required information in the handover folder.

• Text Documents created by the Contractor shall be either in ODF (ISO/IEC 26300:2006) or PDF formats. File must not be a scanned image.

• CAD drawings shall be presented in both DWG and PDF format• Spreadsheets shall be in either CSV or ODF (ISO/IEC 26300:2006) format.• Test results database must be included.
