What is the function of a ground fault circuit interrupter?

The function of a ground fault circuit interrupter (GFCI) is focused on safety by detecting an imbalance in current between the hot and neutral wires. This scenario typically occurs when electricity leaks to the ground, which can happen if there is a fault in the wiring or if a person comes into contact with a live electrical source. When the GFCI senses this imbalance, it quickly cuts off the electrical supply, preventing potentially dangerous shock or electrocution.

This safety device is crucial in environments where moisture is present, such as kitchens or bathrooms, where the risk of electrical shock is heightened. By interrupting the circuit as soon as it detects any abnormal current flow, a GFCI can help protect both people and equipment from serious harm. Other options, such as preventing surges of electricity or regulating electrical output, do not specifically pertain to the primary function of a GFCI. Additionally, monitoring energy usage is a function that aligns more with energy management devices rather than a GFCI’s safety role.