⚠️ Disclaimer: This calculator provides estimates for educational purposes using a simplified IEEE 1584 model. Do not use for actual arc flash labeling or PPE selection. A full arc flash study by a licensed engineer using IEEE 1584-2018 software (ETAP, SKM, EasyPower) is required for compliance with NFPA 70E and OSHA 1910.269.
When to use: Arc flash analysis is required by NFPA 70E for any energized electrical work. The analysis determines incident energy (cal/cm²) — the amount of thermal energy that could contact a worker at a given working distance. This determines the required PPE category and establishes the arc flash boundary (the distance where a worker would receive a 1.2 cal/cm² second-degree burn). Results must be posted on equipment labels per NFPA 70E 130.5.