Arc rated clothing is to be worn when the incident energy level is greater than 1.2 cal/cm^2. NFPA 70E specifically states:
130.7(C)(6) Body Protection. Employees shall wear arc-rated clothing whenever there is possible exposure to an electric arc flash above the threshold incident energy level for a second-degree burn [1.2 cal/cm^2]
Here is the first question of the week for 2021:
Do you/employees/clients wear arc rated clothing around electrical hazards LESS THAN 1.2 cal/cm^2? No Yes – sometimes Yes - always
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