![]() ![]() The issue here is the heat generated from a flash that results in burns. If an arc flash occurred, this boundary is where an employee would be exposed to a curable second degree burn (1.2 calories/cm2 ). These boundaries are: Flash Protection Boundary (outer boundary)Īn arc flash boundary is the farthest established boundary from the energy source. The National Fire Protection Association (NFPA) has developed specific approach boundaries designed to protect employees while working on or near energized equipment.
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