Codes & compliance · Glossary
AFCI
Also called: Arc Fault Circuit Interrupter
An AFCI (Arc Fault Circuit Interrupter) is a breaker that detects dangerous arcing in wiring and trips before the arc starts a fire. The National Electrical Code requires AFCI protection on most circuits in bedrooms, living rooms, kitchens, hallways, and other living spaces in renovated work.
Why this matters for renovation projects
AFCI shows up on permits, contracts, or estimates that Renology covers across LA, San Diego, San Francisco, Seattle, Portland, and Denver. Most homeowners encounter the term once a project is already mid-flight, when there is no time to learn its mechanics without slowing the contractor. Knowing what it means before signing the contract is the difference between a clean project and an avoidable surprise. For how Renology calibrates cost ranges against permit valuations and contractor invoices, see the methodology.