Arc-Flash Incident Energy

Estimate incident energy and arc-flash boundary from the bolted fault current and clearing time (IEEE 1584-2002 simplified model).

Inputs

System voltage (line-line) kV

Bolted fault current I_bf kA

Arc duration (clearing time) s

Working distance mm

Gap between conductors mm

Enclosure —

Results

Note — Simplified IEEE 1584-2002 model for first screening only. Incident energy rises sharply with fault current and clearing time; the boundary is set for the 1.2 cal/cm² limit. Always confirm with a full IEEE 1584 / NFPA 70E study using certified software and a qualified engineer.