AFCI Breaker
Also called: arc fault circuit interrupter
⚡ Electrical — a term you may see in your inspection report.
What is an AFCI breaker, and how is it different from a GFCI?
AFCI stands for Arc Fault Circuit Interrupter. Where a GFCI protects people from shock, an AFCI protects the house from fire. It listens for the electrical signature of arcing — the sputtering that happens at a damaged wire, a loose connection, or a nail driven through a cable — and cuts power before that arc can ignite something. Newer homes have AFCI protection on most living-area circuits. Older homes generally don't, and that's not a defect; it's an upgrade worth knowing about.
- What it protects
- The structure, from fire
- Versus GFCI
- GFCI protects people from shock; AFCI protects the house from arcing
- Where required
- Most living-area circuits in newer construction
- In older homes
- Usually absent — an upgrade, not a defect
What it actually is
An arc is electricity jumping a gap it shouldn't. It can happen inside a wall for years without tripping a normal breaker, because the total current never gets high enough. An AFCI recognizes the pattern rather than the amount.
Why it matters in East Texas
This is one I explain out loud on almost every new-construction walkthrough, because buyers see "AFCI" on a breaker and assume it's the same thing as the GFCI in their bathroom. Two different jobs, two different devices, and a house really wants both.
What I do when I find one
I note whether AFCI protection is present and where. On new construction I check that it's installed where current standards call for it. On older homes I mention it as a safety upgrade rather than writing it up as a failure.
What it means for you
If you're buying an older home, this is a good conversation to have with an electrician — often it can be added at the panel without rewiring anything.
More electrical terms: Knob & Tube Wiring · Federal Pacific Stab-Lok Panel · Zinsco Panel · Double-Tapped Breaker · GFCI Outlet
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