What is the role of a Ground Fault Circuit Interrupter (GFCI)?

A Ground Fault Circuit Interrupter (GFCI) plays a crucial role in electrical safety by detecting changes in electricity flow. Specifically, it monitors the flow of electrical current through a circuit and can sense when there is an imbalance, which may indicate that current is flowing through an unintended path, such as through water or a person. This imbalance can occur if there is a ground fault, which poses a significant risk of electric shock.

When the GFCI detects this discrepancy, it acts quickly by cutting off the electrical supply to prevent potential injury or damage. This immediate response helps to safeguard individuals from electrocution and protects equipment from faults.

The other options, while they involve some aspects of electrical systems, do not accurately describe the GFCI's primary function. Increasing electrical flow and reducing voltage surges are not roles of the GFCI, nor does it serve merely as a complement to circuit breakers; instead, it serves as an essential safety device in circuits where water exposure is a risk, such as bathrooms, kitchens, and outdoor outlets.