What is an arc flash defined as?

An arc flash is defined as electrical current passing through air gaps, which creates a luminous discharge between two conductors or a conductor and the ground. This phenomenon occurs when the insulation between conductors fails or is bypassed, allowing current to flow directly through the air. The intense heat generated can lead to severe injuries, equipment damage, and fires.

In this context, the passing of electrical current through air not only highlights the mechanism of an arc flash but also underscores the dangerous conditions such as high temperatures and explosive energy releases that can occur during such an event. Understanding this definition is crucial for safety protocols in electrical work, emphasizing the need for appropriate protective equipment and preventive measures.