EPSCO Arc Flash Study Incident Energy Calculation
Technical Documentation Incident Energy Calculation


Incident Energy, as defined by IEEE 1584 & NFPA 70E, is the amount of energy impressed
on a surface, a certain distance away from the source, generated during an electrical
arc event. As definitions go, this is straightforward, but how do we calculate this? Well,
the most common way is per equations found in IEEE 1584. (This is how our arc flash
calculator app calculated incident energy) Where voltage is between 208 & 15kV, bolted
fault current is between 700 & 106,000 Amps, and conductor gap is between 13mm &
153mm, we use the following steps (please note this process has been simplified and
should not be used independently.)