What kind of current does a Ground Fault Circuit Interrupter respond to?

A Ground Fault Circuit Interrupter (GFCI) is specifically designed to detect leakage current, which refers to any current that deviates from the intended circuit path and flows to the ground. This could happen in situations where there is a fault in the electrical system, such as damage to insulation or when a live wire comes into contact with a grounded surface.

The GFCI continuously monitors the current flowing through the hot and neutral wires. If it detects any discrepancy that indicates that some current is leaking away from the circuit, which might pose a shock hazard, it reacts quickly to cut off the electrical supply, thereby preventing potential injury or electric shock.

Understanding the function of GFCIs is crucial for anyone working with electrical systems, particularly in environments where moisture is present, as the risk of electrical shock is significantly heightened.