What is arc flash?

Arc flash is defined as a rapid release of energy due to an electric arc through the air. This phenomenon occurs when there is a fault or a short circuit, and the electrical current jumps through the air, creating a high-temperature plasma that can cause severe burns, equipment damage, and other hazards. The energy released during an arc flash can reach temperatures exceeding 35,000 degrees Fahrenheit, which is significantly hotter than the surface of the sun.

Understanding arc flash is critical for electrical safety practices, as it helps identify risks in electrical systems and emphasizes the importance of protective equipment and safety protocols. While there are other electrical events that involve surges, faults, or short circuits, they do not fully capture the specific nature and dangers of arc flash incidents, which involve rapid energy discharge and the dynamic movement of electrical arcs.

Recognizing the characteristics of arc flash is essential for workers who operate near electrical equipment and for the implementation of safety measures to protect against this particular hazard.