Modern California Electrical Code requires two different kinds of protective outlets in homes — GFCI and AFCI — and they prevent two very different problems. Understanding the difference helps you spot when your home is missing protection a code update would now require.
What does GFCI do?
GFCI stands for Ground Fault Circuit Interrupter. It detects when current is leaking out of the intended path — usually because someone has touched a hot wire, or water has bridged the circuit — and it trips in about 25 milliseconds. Fast enough to prevent a fatal shock.
You'll recognize GFCI outlets by the two buttons in the middle: TEST and RESET.
Where GFCI is required
Per the California Electrical Code (currently the 2022 CEC, based on the 2020 NEC), GFCI protection is required at:
- All bathroom outlets
- All kitchen counter outlets
- Within 6 feet of a sink (laundry, wet bar, utility)
- All garage outlets
- All outdoor outlets
- Crawlspaces and unfinished basements
- Pool and spa equipment circuits
- Dishwasher circuit (newer code)
What does AFCI do?
AFCI stands for Arc Fault Circuit Interrupter. Where GFCI prevents shocks, AFCI prevents fires. It detects the unique electrical signature of an arcing connection — a loose wire, damaged insulation, or a stapled-through cable in the wall — and trips before the arc can ignite surrounding materials.
House fires from electrical arcs kill more people each year than electrocution. AFCI is genuinely lifesaving in older homes with aging wiring.
Where AFCI is required
AFCI protection is required on most 120-volt branch circuits in living spaces:
- Bedrooms (the original AFCI requirement)
- Living rooms, family rooms, dens
- Hallways
- Closets
- Dining rooms
- Kitchens (newer code — combined AFCI/GFCI)
- Laundry rooms
Combination AFCI/GFCI
For circuits that need both protections — like kitchens and laundry — a combination AFCI/GFCI breaker or outlet handles both. These are now standard in new builds and major renovations.
"My older home doesn't have these — do I have to add them?"
Existing homes are generally grandfathered. You're not required to retrofit AFCI/GFCI just because the code changed. But any time a circuit is extended, replaced, or modified — including a panel upgrade — that circuit must come up to current code. Most major remodels in Acton and the Antelope Valley involve some AFCI/GFCI retrofitting along the way.
Should you upgrade voluntarily?
Yes — especially for GFCI in any wet area. A $25 GFCI outlet, installed in 30 minutes, eliminates the leading cause of household electrocution. AFCI is a smaller-impact upgrade if you have older wiring or aluminum branch circuits, since arc faults are most common in degraded connections.
Common installation mistakes
We see two things constantly when we open older panels in the Antelope Valley:
- "Backstabbed" outlets — wires pushed into the small holes on the back instead of clamped under the screws. These work loose over time and are a leading cause of arcing. Always have an electrician land conductors under the screws.
- Old GFCI outlets that no longer trip on test — GFCI has a finite life (usually 10–15 years). Test yours every month with the TEST button. If it doesn't trip, replace it.
Want a GFCI/AFCI safety inspection of your home? B&M Electrical does whole-home walkthroughs in Acton, Palmdale, Lancaster, Santa Clarita, and the Antelope Valley. Call (661) 676-0615 or request a quote.