Arc/Arcing
Arc/Arcing : Either intentionally (by a switch), or accidentally (because of a loosened terminal), heating that results from high resistance when an electric current is interrupted. The degree of heat or intensity of the arc depends upon the amount of current in the circuit. Electric arcs can ignite combustibles because of sparks being thrown in the general vicinity of the fault, whereas fault type heating alone, in an overloaded conductor, may result in the ignition of insulation and of combustibles in the immediate proximity of the conductor. Either of the above conditions can result without opening the circuit breaker or other circuit safety device
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