This guide provides models and an analytical process to enable calculation of the predicted incident thermal energy and the arc-flash boundary. The process covers the collection of field data if necessary, consideration of power system operating scenarios, and calculation parameters. Applications include electrical equipment and conductors for three-phase alternating current (ac) voltages from 208 V to 15 kV. Calculations for single-phase ac systems and direct current systems are not a part of this guide, but some guidance and references are provided for those applications. Recommendations for personal protective equipment to mitigate arc flash hazards are not included in this guide.
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