Safety & Prevention · GFCI & AFCI
What they are, where they're required, testing schedule.
An AFCI (arc-fault circuit interrupter) breaker detects the tiny electrical arcs that precede electrical fires — the kind that happen inside walls where you can't see them. Modern electrical code requires them on most living-space circuits. Homes built before ~2008 typically don't have them; retrofit is a licensed-electrician job worth doing.
