The Arc Energy Covenant: Ensure correct calculations for energy reductions

摘要

Available fault current, short-circuit current rating, arc energy, arc flash hazards, and incident energy are closely related in both the National Electrical Code (NEC) and NFPA 70E, Standard for Electrical Safety in the Workplace. However, enforcement of the NEC and NFPA 70E are handled very differently. The NEC is basically an electrical installation code, primarily dealing with de-energized installations, and enforced by the local authorities having jurisdiction (AHJ) or municipal or state inspectors. Once a system is energized, NFPA 70E requires employers and employees to comply with certain safety standards, and it is enforced by either local or federal Occupational Safety and Health Administration (OSHA) regulators.