Which action does a GFCI take when it detects a ground fault?

When a Ground Fault Circuit Interrupter (GFCI) detects a ground fault, it disconnects the electricity supply to prevent electric shock or fire hazards. This quick disconnection is a critical safety feature that protects users, especially in environments where water and electricity may come into contact, such as kitchens and bathrooms.

Ground faults occur when there is an unintended path for current to flow to the ground, which can happen if there is a fault in the electrical equipment or if a person comes into contact with a live conductor. The GFCI continuously monitors the current flowing through the circuit and can sense even slight imbalances between the hot and neutral wires. If it detects that the current is leaking, it reacts within milliseconds by tripping and cutting off the circuit, ensuring safety.

This rapid interruption is essential for preventing serious injuries or fatalities due to electric shock, making the GFCI a vital component in many electrical systems.