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NFPA 70E: Arc Flash
Confused about National Fire Protection Agency (NFPA) 70E, the arc flash
protection standard? NFPA 70E establishes specific guidelines for working on
high-voltage-energized systems and equipment. According to these standards,
high voltage is anything over 50 volts. OSHA standards reference compliance
with NFPA 70E for working on energized systems and equipment. The following
are some key components to NFPA 70E:
Key factors when working with energized equipment:
De-energize, de-energize, de-energize.
Only qualified and authorized personnel are allowed to work on
energized systems or equipment; all other personnel should be clear of
the work area.
Perform arc flash calculations.
Maintain proper clearance distances.
Set up access boundaries.
Ensure that all personal protective equipment (PPE) is available and
inspect for damage of defective equipment before beginning work.
Use only properly rated tools and PPE when performing the work.
De-energize, de-energize, de-energize.
Remember: Work electrical circuits and equipment de-energized. If the situation
requires you to work the system hot, be sure to follow the NFPA 70E guidelines.
For more information, visit www.osha.gov.