Arc Flash Analysis

Arc Flash Hazard Analysis

What is an Arc Flash: An electric arc is a luminous bridge formed in a gap between two electrodes. An Arc Flash occurs during a short circuit condition, or a fault, which passes through this arc gap. The Arc Flash can be initiated through accidental contact, dust build-up, equipment that is underrated for the available short circuit current, or corrosion of equipment and other parts. This disastrous event can expel large amounts of deadly energy as the arc causes an ionization of the air, and temperatures can reach as high as 35,000 degrees Fahrenheit. That kind of temperature can severely burn human skin in a fraction of a second, even at a significant distance from the event itself. It also poses the risk of igniting any nearby combustible materials.

To identify the specific arc flash hazard at a given piece of equipment at a facility, an arc flash analysis must be performed. NFPA 70E was put in place to ensure that employers and property owners were more aware of the dangerous and lethal effects of arc flashes. Noncompliance can result in substantial fines to employers. The MTA Arc Flash Analysis includes:
  • Short Circuit Calculation
  • Protective Device Coordination
  • Arc Flash Hazard Calculation
  • Documentation
  • Unsafe Work locations
  • Arc Flash Hazard Mitigation

Why should you get an Arc Flash Hazard Analysis?

Arc flashes are potentially some of the most dangerous electrical risks that can exist in the workplace. These incidents often occur without warning and can cause serious damage in just a matter of seconds. Your employees and your customers could be at risk of injury or bodily harm if your electrical system is not properly maintained. Additionally, you could risk losing hundreds or even thousands of dollars in replacing any equipment that might be damaged during an arc flash. Finally, if it is found that an arc flash has occurred due to noncompliance with OSHA guidelines, you could be charged a substantial fine.

Within an arc flash hazard analysis, your electrical engineer will observe and analyze your equipment and electrical system to ensure that everything is in proper working order. They will also calculate the risk of an arc flash occurring in your workplace and will provide guidance on how to minimize this risk. If any of your equipment or any portion of your electrical system needs to be repaired or replaced, your electrical engineer can help you decide on the best course of action. Being proactive in securing an arc flash hazard analysis can save you from significant financial loss and unnecessary stress in the long run.

Read some of our helpful articles to learn more about Arc Flash studies:


Call MTA for an Arc Flash Analysis in California and the San Diego area and improve employee safety today.

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