Answer: A
Step-by-step explanation:
An arc flash is the explosive energy released when an electrical fault—a short circuit, for instance—causes an arc. This is measured in terms of arc flash incident energy and typically happens when an electric current passes through air as the result of a conductor failure, equipment failure, or the accidental connection between voltage sources such as dropping a tool across buses in distribution equipment.
The explosive energy resulting from an arc flash can be deadly or cause severe injury. The incident energy generated from an arc flash can release temperatures in excess of 36,000 degrees Fahrenheit, which is four times hotter than the sun. Any metals vaporized by the explosion (e.g., copper, aluminum) would also be fatal if inhaled.