Saudi Electricity Company الشرآة السعودية للكهرباء

SEC DISTRIBUTION CONSTRUCTION STANDARDS

SDCS-02 Dated: MAY 2011

Page 3 of 13

1. SCOPE:

This standard specifies the guidelines and requirement governing the design

and installation of underground fiber optic cables, to be laid along with the

medium voltage cables and the HDPE duct with the plastic rope inside to be

placed below the low voltage cable for future use.

2. SERVICES CONDITION AND CONSTRUCTION PARAMETERS:

For construction and operation of underground fiber optical cable, the service

condition and requirement shall be given in latest revision of SEC and General

Specification No. 01-SDMS-01.

3. LAYING OF FIBER OPTIC CABLES:

Fiber optic cables shall be laid together with medium voltage cable in the

underground distribution system for a scheme connecting the two sub-

stations. Contractor strictly to adhere the procedure and the dimensions of the

cable trench specified in the under ground construction standard (SDCS-02).

Fiber optic cable of 96 cores of type " non metallic direct buried " shall be laid

along with the medium voltage cables as shown in the drawing nos. 1,2 & 3.

At the end of fiber optic cable, contractor should leave a loop of 25 meter inside

the primary sub station and hang this to any wall near to the termination point

of 13.8 KV cable. For a unit sub-station, contractor should leave 5 meter fiber

optic cable loop and hang at any wall near to the side of 13.8KV cable

termination.

Saudi Electricity Company الشرآة السعودية للكهرباء

SEC DISTRIBUTION CONSTRUCTION STANDARDS

SDCS-02 Dated: MAY 2011

Page 4 of 13

3.1. SAFETY GUIDELINES FOR PLACING FIBER OPTIC CABLE :

While laying the fiber optic cable, contractor has to abide precautionary measures to

avoid the damaging the cable by making sharp bends, crushing the cable and

excessive pulling of the cable which may change the transmission characteristics of

fiber.

3.2 PULLING PROCEDURES OF FIBER OPTIC CABLE

It is important that all personnel who are engaged in the laying work shall be familiar

with the fiber optic cable laying practices. Contractor should follow the international

standard procedure for pulling fiber optic cable.

Fig 4 which shows correct and incorrect method of pulling.

4. LAYING DUCT WITH LV POWER CABLE

Duct HDPE of size 50mm diameter complete with a plastic rope inside, shall be laid

under the LV power cable as shown in the Fig.5,6 & 7

Fig. 8, shows the arrangement of duct together with a plastic rope inside for pulling

purpose. There should be one cap at the end of each duct to prevent entering of the

water.

Fig 9, specifies the details of placing the ducts at the consumer premise.

Fig 10, shows arrangement of laying duct in the trench of LV cable.

Fig.11, Arrangement of laying ducts in LV feeder trench for different customers.