What does a GFCI do?

A Ground Fault Circuit Interrupter (GFCI) is specifically designed to enhance safety by protecting against ground fault hazards. It continuously monitors the electrical current flowing through the circuit and can detect imbalances between the incoming and outgoing current. If it senses a difference, which may indicate that some of the current is leaking to the ground through an unintended path (like a person), the GFCI quickly cuts off the power to prevent electric shock.

This protective function is particularly crucial in wet or damp areas, such as bathrooms, kitchens, and outdoor settings, where the risk of electric shock is higher. By interrupting the circuit when a ground fault is detected, a GFCI effectively reduces the potential for serious injury or fatality.

Understanding this is essential for anyone working with electrical power systems to ensure safety and compliance with electrical codes.