Define 'arc flash.'

Arc flash refers to a significant and dangerous electrical explosion that occurs when there is a fault in electrical equipment, leading to an arc that can generate tremendous amounts of heat, light, and pressure. This phenomenon can happen when electrical current jumps through the air, typically between conductive parts that are not intended to be connected. The result is a violent release of energy, which poses serious hazards to individuals working nearby, as well as potential damage to equipment and property.

The selection of this definition reflects a clear understanding of the mechanics and consequences of an arc flash event, emphasizing both its explosive nature and its origin in electrical faults. It highlights the inherent dangers in electrical systems, particularly in environments where safety precautions and protective devices must be engaged to mitigate these risks effectively. By accurately defining arc flash in such terms, one can appreciate the importance of safety protocols and the need for protective devices to work around high-voltage systems.