How does NFPA 70E define an arc flash hazard?

The correct definition of an arc flash hazard, according to NFPA 70E, identifies it as a source of injury related specifically to electric arcs. An arc flash occurs when an electrical fault generates an intense burst of energy due to the rapid release of heat, light, and pressure from the electrical arc. This phenomenon poses significant risks, including severe burns, hearing loss, and other injuries from the intense heat and blinding light.

Understanding the specific nature of injuries related to electric arcs is crucial for safety measures and protective practices in electrical work environments. The definition emphasizes the potential for serious harm and reinforces the importance of following safety protocols to protect personnel who may encounter these hazards. It highlights the need for proper training, use of personal protective equipment (PPE), and maintenance strategies to mitigate the risks associated with arc flashes in electrical systems.