Note: This article references the 2020 NEC because the Philadelphia area — the jurisdiction where this author teaches and ...

Later, I spent the better part of a month installing AFCI protection ... Just like a GFCI, AFCI protection can be provided by receptacles or circuit breakers, and they must be readily accessible.

Alternatively, turn off the main breaker. Look at the wires coming into and going out of the devices in the old box. Identify ...