What is the function of an AFCI breaker?

The function of an AFCI (Arc Fault Circuit Interrupter) breaker is specifically designed to protect against arc faults, which are unintended electrical discharges that can occur in wiring or devices. These arcs can generate heat and potentially lead to electrical fires if left unchecked. AFCI breakers detect the unique signature of an arc and disconnect the circuit before it can cause a fire, thus enhancing the safety of electrical systems, particularly in living spaces like bedrooms and other areas where the risk of fire is a concern.

In contrast, other types of breakers serve different protective roles. For example, breakers that protect against short circuits are focused on interrupting excessive current flows due to immediate faults. Ground fault protection deals with currents that stray from their intended path to the ground, which can cause electric shock. Lastly, overload protection is aimed at preventing wiring from overheating by managing excessive current draw over a sustained period. Each protective device plays a crucial role in overall electrical safety, but AFCI breakers are uniquely tailored to address the risks associated with arc faults specifically.