What does an AFCI device provide protection from?

An AFCI (Arc Fault Circuit Interrupter) device is specifically designed to provide protection from the effects of arc faults. Arc faults are undesired electrical discharges that can occur in wiring, typically due to damaged insulation or loose connections. These faults can lead to electrical fires if not detected and addressed promptly.

The AFCI works by monitoring the electrical waveform on the circuit. It can distinguish between normal load conditions and the abnormal conditions created by arc faults, allowing it to shut off the circuit before a fire can start. This makes AFCIs a critical safety feature in residential and commercial electrical systems, particularly in living areas where the risk of ignition from such faults is higher.

Protection measures against overcurrent incidents, short circuits, or ground faults are the functions of other devices like circuit breakers and GFCI (Ground Fault Circuit Interrupter) devices. While these devices are essential for overall electrical safety, they do not specifically target the unique risks posed by arc faults, which is where the AFCI's role becomes crucial.