The main function of a GFCI circuit breaker is to:

The main function of a Ground Fault Circuit Interrupter (GFCI) circuit breaker is to detect ground faults. Ground faults occur when electrical current deviates from its intended path, typically when it flows through an unintended path such as water, a person, or other conductive materials. This can happen in situations where there is damaged insulation or wet conditions, posing a significant risk of electric shock or electrocution.

A GFCI works by continuously monitoring the electrical current flowing through the circuit. If it senses an imbalance between the current entering and leaving the circuit — which indicates a possible ground fault — it will quickly disconnect the power, usually within milliseconds. This rapid response is crucial in preventing serious injuries or fatalities associated with electric shock.

This protective mechanism is distinct from protecting against overloads, which typically involves overcurrent protection devices like fuses or standard circuit breakers but does not specifically provide safety against ground faults. Similarly, while GFCIs can contribute to reducing the risk of electrical fires by preventing conditions that may lead to overheating, their primary focus is on shock protection through ground fault detection. Lastly, enhancing voltage regulation is not a function associated with GFCIs, as voltage regulation refers to maintaining constant voltage levels in circuits, which does not relate to