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Published on Apr 15, 2010
An arc fault is a dangerous electrical problem caused by damaged, overheated, or stressed electrical wiring or devices. Arc faults can occur when older wires become frayed or cracked, when a nail or screw damages a wire behind a wall, or when outlets or circuits are overburdened.
Arc fault circuit interrupters, or AFCIs, are devices that replace standard circuit breakers in your home's electrical service panel. Combination AFCIs provide a higher level of electrical fire protection by detecting hazardous arcing conditions and shutting down the electricity before a fire can start.