Arc Flash Hazard Mitigation

129 Pages·2015·4.19 MB·English

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Arc Flash Hazard Mitigation
August 25, 2015
Luaya Halig, PE
Judy A. Robinson
Agenda
• Arc Flash Requirements – NFPA 70E and
OSHA
• NEC Arc Energy Reduction
• Arc Flash Hazard Mitigation Techniques
• Arc Resistant Equipment
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Arc Flash Requirements
NFPA 70E 2015
OSHA 29 CFR 1910.269
August 25, 2015
Luaya Halig, P.E.
Service Sales Engineer
Outline
• NFPA 70E 2015
• Arc Flash Definition
• Overview of Arc Flash Requirements
• Important Changes to Arc Flash in latest Revision
• Arc Flash PPE Categories vs. Incident Energy
Analysis Methodology
• OSHA 29 CFR 1910.269
• What are The New Requirements?
• When is Compliance Due?
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NFPA 70E 2015
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Arc Flash Introduction
(NFPA70E Article 100)
Arc Flash Hazard - A dangerous condition associated with the
possible release of energy caused by an electric arc.
• An arc flash hazard may exist when energized electrical
conductors or circuit parts are exposed or when they are within
equipment in a guarded or enclosed condition, provided a
person is interacting with the equipment in such a manner that
could cause an electric arc.
• Under normal operating conditions, enclosed energized
equipment that has been properly installed and maintained is
not likely to pose an arc flash hazard.
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NFPA70E Overview - Article 130.2(A)
Work Involving Electrical Hazards
Am I required to wear PPE for every task
performed on electrical equipment?
Electrically Safe Working Conditions
NFPA-70E Exceptions
1. Additional Hazards or Increased Risk
2. Infeasibility
3. Less than 50 Volts
New Exception to the 2014 NFPA-70E
4. Normal Operation
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NFPA70E Overview - Article 130.2(A)(4)
Work Involving Electrical Hazards
Normal operation of electric equipment shall be permitted
where all of the following conditions are satisfied
130.2(A)(4):
(1) The equipment is properly installed.
(2) The equipment is properly maintained.
(3) The equipment doors are closed and secured.
(4) All equipment covers are in place and secured.
(5) There is no evidence of impending failure.
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Who Does These Changes Affect?
• Qualified personnel working on electrical
equipment.
• Personnel working near energized electrical
equipment.
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New Terms in NFPA-70E
• Risk:
• “A combination of the likelihood of occurrence of injury or damage
to health and the severity of injury or damage to health that results
from a hazard.”
• Risk Assessment
• “An overall process that identifies hazards, estimates the potential
severity of injury or damage to health, estimates the likelihood of
occurrence of injury or damage to health, and determines if
protective measures are required.”
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