AFCI Breaker
An arc-fault circuit interrupter that detects the unique signature of an electrical arc and shuts off the circuit before it can ignite a fire.
Quick answer
AFCI Breaker: An arc-fault circuit interrupter that detects the unique signature of an electrical arc and shuts off the circuit before it can ignite a fire. Typical cost: $40–$70 per breaker; $200–$400 installed for a typical panel retrofit per circuit..
Why it matters
Arc faults cause an estimated 28,000 home fires per year. AFCIs are now required by the NEC in most residential living areas — bedrooms, kitchens, living rooms, hallways, and laundry.
Typical cost
$40–$70 per breaker; $200–$400 installed for a typical panel retrofit per circuit.
Pros
- • Detects fires before they start
- • Required by current NEC
- • Combination AFCI/GFCI versions available
Cons
- • More nuisance trips than GFCIs
- • Older appliances can confuse the sensor
- • Only some breaker panels accept AFCIs
Common uses
- • Bedrooms, kitchens, living rooms, hallways
- • Required on any new residential branch circuit
Alternatives
AFCI outlet receptacles
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Frequently asked questions
- Are AFCIs required by code?
- Yes in most residential rooms under the 2014+ NEC. Local adoption varies — check with your inspector.
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