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All You Need to Know about OSHA and Arc Flash

With the increase in awareness of the severity and frequency of electrical arc-flash hazards, OSHA realized the need to provide more direction and regulation to its general language. The result was a final rule to 29 CFR 1910.269, the Electrical Power Generation, Transmission, and Distribution Standard which became effective on July 10, 2014. This was the first time OSHA mandated specific arc-flash related requirements which go beyond general hazard awareness and also set mandatory compliance deadlines. At CBS ArcSafe, safety of our customers’ electrical workers is our top priority. In order to achieve this goal, CBS ArcSafe stays informed about current and new requirements from both the Occupational Safety and Health Administration (OSHA) and the National Fire Protection Association (NFPA).

arc flash incident

What is an arc flash?

An arc flash is a phenomenon where a flashover of electric current leaves its intended path and travels through the air from one conductor to another, or to ground. The results are often violent and when a human is in close proximity to the arc flash, serious injury and even death can occur.

What can cause an arc flash?

  • Dust
  • Mishandling of tools
  • Accidental contact
  • Condensation
  • Equipment/material failure
  • Corrosion
  • Faulty installation

What can result from an arc flash?

  • Burns
  • Fire
  • Flying objects
  • Blast pressure (upwards of 2,000 lbs./s.f.)
  • Sound blast (upwards of 140 dB)
  • Extreme heat (upwards of 35,000 degrees F)

How to protect workers from arc flash:

  • De-energize the circuit
  • Energized electrical work permit
  • Personal protective equipment
  • Insulated tools
  • Written safety program
  • Job briefing

What questions will OSHA ask you when an arc flash has happened at your facility?

  • Is there a description of the circuit or equipment at the job location?
  • Is there a detailed job description of planned work?
  • Can you justify why equipment cannot be de-energized or the job deferred until the next scheduled outage?
  • Were the workers performing the tasks qualified to do so?
CBS ArcSafe remote racking for OSHA safety image

What is the arc flash warning label?

An evaluation of arc flash and shock protection needs to be performed on each piece of equipment operating at 50 volts or more and not put into a de-energized state. The evaluation will determine the actual boundaries (i.e. prohibited, limited, restricted, etc.) and will inform the worker of what personal protective equipment must be worn.

An Arc Flash Hazard warning label must be affixed to the equipment once the evaluation is completed. This label must be readily accessible to employees who may work on the energized equipment.

arc-flash explosion photo

Minimum arc-flash label example

arc-flash hazard label

Preferred/detailed arc-flash label example

detailed arc-flash hazard label

OSHA Arc Flash Violation Samples:

January 21, 2017 – OSHA launches inspection into incident in which one worker died and another was hospitalized in critical condition from arc flash at a construction site in Amarillo, TX.

May 2 – Region 4 – OSHA cites Georgia Power, wiring subcontractor after arc flash severely burns worker at the Plant Bowen facility; proposes $122K in fines.

OSHA Arc Flash Standards

CBS ArcSafe and EC&M Magazine Take Arc-Flash Safety Seriously

CBS ArcSafe has teamed up with EC&M Magazine with sponsoring the arc-flash information channel for EC&M. Stay informed with the latest information from around North America about arc-flash incidents, enforcement, and migitaiton by visitng CBS ArcSafe’s sponsored channel.


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