The purpose of the guide is to enable qualified person(s) to analyze power systems for the purpose of estimating the incident energy to which employees could be exposed during operation and maintenance work. Contractors and facility owners need this information to provide appropriate protection for employees in accordance with the requirements of applicable electrical workplace safety standards.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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