Square D® Combination Arc-fault Circuit Interrupters
Enhanced protection against home electrical fires

Square D combination arc-fault circuit interrupters (AFCIs) are the first commercially available products designed to comply with the requirements of the National Electrical Code® (NEC®) for combination AFCI protection. Combination AFCI circuit breakers have the ability to sense and respond to a broader range of arcing incidents, providing enhanced protection against electrical fires for homes and families.

Combination AFCI circuit breakers provide an added dimension of safety for homeowners by sensing and responding to both parallel and series arcing incidents. Series arcing is often associated with damaged devices or cord sets. A series arc is an arcing incident across a break in a conductor. A common example is a cut across one of the two wires in a lamp cord, with a dangerous arc forming in the gap. Combination AFCI circuit breakers detect the arcing condition and turn off the circuit, thus providing the enhanced protection.