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ASP practice question: Arc flash boundary
Question of the Day for Tuesday, 6 October 2026
ASP · Fire Prevention and Protection
The arc-flash boundary is defined as the distance within which:
Explanation
The arc-flash boundary marks the distance from exposed energized parts at which the incident energy from an arc would be about 1.2 cal/cm^2, the threshold for a second-degree burn on bare skin. Inside that boundary, appropriate arc-rated PPE is required. Fire-exit placement, noise action levels, and grounding-electrode requirements are unrelated concepts governed by different standards (Ref: NFPA 70E).Practise more questions like this
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