Which safety device is used to detect arc faults?

The arc fault circuit interrupter (AFCI) is designed specifically to detect arc faults, which are unintended electrical discharges that can occur due to damaged wiring, loose connections, or other issues. These faults can produce high temperatures and lead to electrical fires if not addressed. The AFCI monitors the electrical circuit it is connected to and can identify the unique signature of an arc fault, rapidly disconnecting the circuit to prevent potential hazards.

In contrast, ground fault circuit interrupters (GFCIs) are intended to prevent electrical shock by detecting ground faults—leakage currents that occur when electricity flows outside its intended path, such as through water or a person's body. Surge protectors are used to protect devices from voltage spikes, while a voltage meter measures electrical voltage, but none of these devices specifically focus on detecting and mitigating arc faults as the AFCI does.