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

Understanding the difference between arc-fault circuit-interrupter protection and ground ... When an outlet is loose, it disrupts the electrical current which can cause (you guessed it) a fire.

But as any radio enthusiast knows, sparks also give off broadband radio noise. Arc-fault circuit interrupters (AFCI) are special circuit breakers that listen for this noise in the power line and ...