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Make the most of your energySM
Compliance Solutions:NFPA 70E 2012 Editionfrom Schneider Electric Services
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Fact:
Electrical hazards cause
more than 300 deathsand 4,000 injuries in the
workplace each year.
Source: Electrical Safety Foundation International (ESFI)
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Risks associated with shock and electrocution from inadvertent
contact with energized parts have long been recognized as
a threat to electrical workers. It has only been in recent yearsthat awareness of the dangers of arc flash events have been
incorporated into electrical safety standards.
Electrical accidents rank 6th among all causes
of work-related deaths in the United States.*
Regulatory agencies soon recognized the severity and urgency o the
situation. The Occupational Saety and Health Administration (OSHA)
developed laws to protect electrical workers. These laws, in essence,
mandate that work on electrical equipment must be perormed in a mannerthat does not expose the worker to undue risk o injury.
The National Fire Protection Association (NFPA) 70E: Standard or Electrical
Saety in the Workplace is the document most oten reerenced or electrical
saety. OSHA enorces electrical workplace saety standards outlined in
NFPA 70E. Enorcement may take place ollowing an electrical accident or
during their normal on-site inspection process.
Schneider Electric Services advocates compliance to NFPA 70E: Standard o
Electrical Saety in the Workplace not only or worker saety, but also equipment
productivity. An arc ash accident can render equipment unusable and place
the acility in a costly downtime mode, which could last hours or days.
It is estimated that the combination of a workplace
injury and equipment downtime can cost as much as
8 - 10 million dollars.
* Electrical Saety Foundation International (ESFI)
The Liberty Mutual Research Institute or Saety reports that electrical
injuries are the second most costly workers compensation claim.
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What a Facility Can Do to Complywith NFPA 70E 2012 Edition.
The newly-released 2012 version of NFPA 70E requires the development
and enforcement of an Electrical Safe Work Practices (ESWP) policy. It also
defines the requirements for safe work practices and requires audits and
revisions to keep the safety policy up to date.
Did you know?NFPA 70E-2012, Section 110.1(A) states that
hiring contractors to perorm electrical work
does not absolve the owner o the acility
(host employer) rom assuring compliance to
sae work practices.
The acility owner is ultimately responsible or
saety at their site and must communicate
known hazards covered by NFPA 70E to the
contracted worker(s).
In addition, the owner must report any
contract employees saety violations to the
contract employer.
While basic compliance to NFPA 70E requirements is
established with a fve-step process, a sixth step assists theacility owner with fne tuning the electrical power system,
both or saety and operability.
Step 1: Develop and Audit Electrical Sae Work
Practices Policy
Step 2: Conduct an Electrical System Study to Determine
the Present Degree o Arc Flash Hazards and
Apply Associated Equipment Labeling
Step 3: Ensure Adequate Supplies o Personal Protective
Equipment (PPE) and Proper Tools
Step 4: Conduct Regularly-Scheduled Saety Training and
Audits or All Electrical Workers
Step 5: Maintain All Electrical Distribution System
Components
Step 6: Follow Strategies to Mitigate and Control ArcFlash Hazards
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Step 1
Develop and Audit an Electrical Safe Work
Practices (ESWP) Policy.
Six-step process
The safety policy is aliving document that must be audited andcorrected over time.
This is a written document created by the
employer that covers all areas o the companys
electrical saety practices. It includes such things
as lock out/tag out procedures, method o
qualiying the workers, selection and application
o PPE, methods o establishing a sae work
area, arc ash and shock protection calculations,
equipment labeling, and worker audit procedures.
While the requirement o developing andenorcing a saety policy has been in NFPA 70E
or several revision cycles, it has been urther
refned in the 2012 standard.
NFPA 70E-2012 clarifes and expands upon the
requirement to audit the saety policy itsel. This
audit must be perormed on a three-year cycle to
assure continued compliance o the policies and
procedures to the standard. When the auditing
determines that the principles and procedures
o the electrical saety program are not being
ollowed, the appropriate revisions to the trainingprogram or revisions to the procedures shall be
made. In addition, workers must be evaluated or
compliance to the standards and the policy, and
any deviations must be documented.
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Step 2
Conduct an Electrical System Study to Determine
the Present Degree of Arc Flash Hazards.
This is an electrical system engineering study that is overseen by proessional
engineers amiliar with the power distribution and control equipment and the
calculation methods required. The methodology or conducting an arc ash
analysis is outlined in IEEE 1584 Guide or Perorming Arc-Flash Hazard
Calculations.
NFPA 70E-2012, Section 130.5 states an arc ash hazard analysis shall
determine the arc ash boundary, the incident energy at the working distance,
and the personal protective equipment that people shall use within the arc
ash boundary.
An arc ash hazard analysis must be updated when a major renovation or
modifcation takes place. At a minimum, it should be reviewed every fve years
because changes in the electrical distribution system could aect the results
o the arc ash hazard analysis.
Apply Warning Labels to Equipment.
NFPA 70E-2012, Section 130.5(C) requires that equipment that is likely to
be examined, adjusted, serviced, or maintained while energized shall be
feld-marked with a label containing all o the ollowing inormation:
1) At least one o the ollowing:
Available incident energy and
corresponding working distance
Minimum arc rating o clothing
Required level o PPE
Highest Hazard/Risk Category
(HRC) or the equipment
2) Nominal system voltage
3) Arc ash boundary
In addition, the calculation method and data to support the inormation or
the label shall be documented.
Schneider Electric can assist with providing the full package including thedata collection, analysis, and label installation.
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Step 3
Ensure Adequate
Supplies of PPEand Proper Tools.
Step4
Conduct Regular Safety
Training and Assessments.
Six-step process
Employees working in areas where there are
potential electrical hazards shall be provided
with personal protective equipment (PPE) that is
appropriate or the specifc parts o the body to be
protected. This can include arc-resistant shirt, pants
or coveralls, or a multi-layer ash suit. Additional
PPE requirements consist o ash hoods, voltage
rated gloves, EH-rated saety shoes, saety glasses,
and hard hats. The 2012 edition o NFPA 70E also
requires employees who are working within the arc
ash boundary to wear hearing protection.
Properly-rated equipment is needed to test
voltages. Insulated tools are required or workers
who are to perorm testing and troubleshooting
on energized equipment.
NFPA 70E defnes a qualifed person as one who has skills and knowledge
related to the construction and operation o the electrical equipment and
systems, and has received saety training to recognize and avoid the hazards
involved. This training requirement means that the employee must have
received saety training specifc to the hazards o arc ash, arc blast, shock,
and electrocution.* Electrical workers are not considered to be qualifed by
OSHA until they have received this specifc training.
Further, the employer must veriy, through regular supervision or through
inspection conducted on at least an annual basis, that each worker is
complying with the saety-related work practices required by NFPA 70E.
This requirement has been added in the 2012 issue o the standard.
* Schneider Electric instructors are OSHA authorized Outreach Trainers to ensure your employees are ormally trained and
aware o arc fash hazards per OSHA and NFPA 70E requirements.
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Step 5
Maintain All Electrical Distribution
System Components.
The active components in electrical distribution systems comprise o uses,
circuit breakers, and protective relays that help protect the system in the event
o an electrical ault. These over-current protective devices have a critical
role in controlling the arc ash energy. Thereore, it is crucial to keep these
devices in proper operating condition with a regular maintenance program.
Without proper over-current protection, sustained arcing can subject electrical
workers to much higher levels o energy. On the other hand, modern, properly
adjusted over-current protective devices that have been well maintained are
able to detect an arcing ault condition and clear the ault quickly.
Unless adequate maintenance is perormed, the electrical system study and
the arc ash analysis will not be a correct representation o the potential
perormance o the power system. Thereore,
in addition to compliance with NFPA 70E,
Schneider Electric recommends that acilities
adopt NFPA 70B 2010 Edition: Recommended
Practice or Electrical Equipment Maintenance.
Our qualifed feld services personnel perorm
on-site preventive and predictive maintenance
services or any manuacturers electrical
equipment. Upon completion, a detailed report is
provided that identifes potential issues along with
corrective recommendations.
Equipment must be in an electrically-safe condition during
maintenance, testing, and repair.9
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Six-step process
Step 6
Follow Strategies to Mitigate and Control
Arc Flash Hazards.This oten overlooked step is one o the most crucial in optimizing the saety
and perormance o the power system. The arc ash study perormed in step
two essentially establishes the arc ash energy levels and the required PPE
or the power system in the existing condition. However, the calculated arc
ash energies may be high enough to hinder some normal tasks rom being
perormed within the arc ash boundary o the equipment. For example, an
incident energy o 35 cal/cm2 may be calculated or a 600 volt motor control
center. To protect the worker rom the arc ash levels, PPE such as heavy
arc-rated clothing and ash hood will be needed. Yet, workers may view the
required arc ash PPE to actually be a hindrance to the job. The difculty in
movement under heavy clothing and the reduction in eye sight under the
Shown above: Virtual Main Relay System or Arc Flash Energy Reduction
heavy ash hood make it difcult, i not impossible,
to perorm proper testing and troubleshooting.
The goal o arc ash mitigation is to reduce the
arc ash energy, and thus the PPE, to a level
that permits normal tasks to be perormed on
equipment. Arc ash mitigation has been a rapidly
developing area o research and development or
Schneider Electric. We are constantly working on
new mitigation strategies to promote electricalworkplace saety.
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Arc Flash Mitigation Solutions
Schneider Electric Services provides a variety of arc flash
mitigation solutions for any brand of electrical equipment.
Solution Group 1
Solution Group 2
Lowers arc flash energy by reducing the arcing time.
Over-Current Protective Device (OCPD) Coordination Study
An OCPD coordination study optimizes circuit breaker and relay settings and can be specifed as a
component o the arc ash study. The speed o operation o the OCPD determines the duration o an
arc ash event.
Specialized Relaying Such as Light Sensing Technology
Strategically-placed light sensors in switchgear compartments makes it possible to sense the arc within amillisecond. Modern relays can sense this condition and trip the appropriate circuit breaker. Other relaying
technologies are zone selective interlocking and dierential protection.
Virtual Main Relay
Low-voltage switchgear and switchboards can be subjected to dangerous levels o arc ash incident
energy when ed directly rom a power transormer. Upgrading switchgear with a virtual main relay adds
over-current sensing to the low-voltage side o the service transormer and is designed to trip an existing
upstream ault-breaking device.
Removes worker from location or places a barrier between workerand exposed energized parts.
Infrared (IR) Windows
IR windows allow you to obtain condition and status inormation o electrical equipment
without the need to remove equipment panels. The complete unit is permanently ftted
into electrical equipment and enables inrared inspections to be perormed without
downtime.
Remote Racking System (RRS)
A RRS allows medium-voltage circuit breaker racking operations to be perormed viaa control panel located away rom the cell, removing the operator rom manual contact
with the circuit breaker. In addition, a RRS may reduce the PPE Hazard Risk category
because the worker is removed rom the ash protection boundary.
Wireless Temperature Monitoring System (WTMS)
A WTMS allows or easy feld installation o wireless sensors into low- and medium-
voltage equipment. Sensors can be placed in locations usually not accessible with an
inrared camera. They can be installed on equipment with high arc ash ratings, allowing
equipment condition to be monitored without a risk o danger to personnel or equipment.
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Why Choose Schneider ElectricEngineering Services for NFPA 70ECompliance Solutions?
Schneider Electric USA
1415 S. Roselle Road
Palatine, IL 60067
Tel: 847-397-2600
Fax: 847-925-7500
www.schneider-electric.com/us
D t N b 1910BR1204 F b 2012
Schneider Electric Engineering Services has been proactively engaged in
electrical workplace safety and compliance since arc flash requirements
were first introduced.
Many o our engineers are leaders in IEEE, NFPA, and other power system standard-making
organizations. Specifcally, we:
Have over 100 strategically-located proessional engineers who are collectively registered in every
state o the U.S. to meet state licensing requirements
Are proessional engineers who have in-depth knowledge o power distribution and control equipment
and expertise o the calculation methods required or arc ash analyses
Provide ull-scope NFPA 70E compliance support and solutions
Oer arc ash mitigation solutions through a variety o engineering and electrical distribution services
Established a standardized methodology to complete arc ash analyses along with uniorm reporting
standards nationwide
Provide generic arc ash analysis specifcations to assist customers with specifcation development
Have the capabilities to perorm the arc ash analysis as well as make recommendations or
corrective action(s)
For more Inormation:
888-778-2733Visit www.SEreply.com and enter keycode m625v
Any engineer ing serv ices reerenced herein sha ll be provided by Schneider Electric Engineering Ser vices, LLC, a wholly-owned
subsidiary o Schneider Electric USA, Inc. This document is or inormation purposes only and is not meant to be construed as an
oer to provide engineering services.