Continued Investigation of Arc Flash in Single-Phase Systems: Threshold for Possible Hazards

IEEE 1584-2018 documents the standard method for calculating arc flash incident energy. This value is then used to establish one of several safety boundaries around exposed, energized electrical conductors and to select protective equipment. While 1584 covers three-phase configurations in detail, it currently excludes single-phase calculations. The prevalence of single-phase ac power distribution inspired curiosity about the possible hazards of fire and injury arising from arc flash in such systems.