What is an AFCI?
An arc-fault circuit interrupter (AFCI) is a protective device that detects dangerous electrical arcing and shuts off the circuit to prevent fires.
An AFCI senses the unique signature of an arcing fault — from damaged, loose, or pinched wiring — and de-energizes the circuit before it can ignite a fire. It's different from a GFCI, which protects people from shock.
The residential code requires AFCI protection on the 120-volt branch circuits serving outlets in most living areas. AFCIs are commonly installed as combination-type breakers in the panel.
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