What is an arcing fault?
According to UL 1699, Standard for Arc Fault Circuit Interrupters, an arcing fault is an unintentional arcing condition in a circuit. Arcing is defined as a luminous discharge of electricity across an insulating medium, usually accompanied by the partial volatilization of electrodes. There are 3 basic types of arcing faults: line-to-neutral, line-to-ground, and series arcing.
