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What is an arc fault circuit interrupter?

By Bob Millaway, South Jersey Community Expert & REALTOR®

An arc fault circuit interrupter (AFCI) is a safety device that detects dangerous electrical arcs in your home's wiring. Arcing occurs when damaged, overheated, or stressed wires create sparks between connections. Unlike a standard breaker that only reacts to overloads or short circuits, an AFCI can detect low-level arcing that starts fires. They are required by code in most living area circuits.

Why It Matters

AFCI breakers prevent electrical fires caused by damaged wiring, worn insulation, and loose connections. They are a critical safety upgrade for any home.

Related Questions

When should I call an electrician? What is a home electrical panel and when should it be upgraded? Why do my lights flicker when the AC turns on? What are GFCI and AFCI outlets and where do I need them? Can I do my own electrical work?

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