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Lockout Electrical Safety Arc Flash

What is arc flash?

Arc flash is a short circuit that flashes from one exposed live conductor to another or to the ground. As a result, ionized air creates electrically conductive, super-heated plasma that can reach temperatures of 5000° or higher. The explosion produces a brilli ant flash of light, intense heat, and pressure equivalent to several sticks of dynamite.

"Prevent serious injury and fatal arc-flash accidents"

NFPA 70 (2005) states: Electrical panels in industrial facilities that are likely to be worked on while energized shall be field marked with a label indicating the incident energy available, or the rating of needed protective clothing in calories per square centimeter to warn of potential electric arc flash hazards and to aid in the selection of flame resistant clothing and other personal protective equipment.