What is an arc flash?

An arc flash is accurately defined as a dangerous release of energy that occurs when an electric arc forms due to a short circuit. This phenomenon happens when there is a fault in the electrical system, allowing current to travel through the air between conductors or from a conductor to the ground. The intense heat generated by the arc flash can result in severe burns, injuries, and even fatalities, making it a critical safety concern in electrical work.

Understanding arc flashes is essential for linemen and other electrical workers, as it directly relates to workplace safety and the implementation of proper protective measures and equipment. Arc flashes can create not only thermal hazards but also create pressure waves and sound blasts, contributing to their danger. The recognition of this hazard drives the necessity for arc flash assessments, training, and the use of personal protective equipment (PPE) to protect workers from potential injuries associated with these incidents.