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

The primary purpose of a Ground Fault Circuit Interrupter (GFCI) is to protect against electrical shocks by monitoring current flow. GFCIs are designed to detect imbalances between the incoming and outgoing current in a circuit. This imbalance can indicate that current is flowing through a different path, such as a person who may be grounded and in contact with an energized part of the circuit. When the GFCI senses this difference, it quickly cuts off the power, minimizing the risk of severe electrical shock or electrocution.

By continuously monitoring the electrical current, GFCIs provide critical protection in areas where water is present, such as kitchens, bathrooms, and outdoor locations. This function makes them essential for maintaining safety in environments where the likelihood of ground faults is higher.

The other options do not accurately represent the function of a GFCI. Enhancing power supply, improving wiring capacity, and ensuring the efficiency of electrical appliances do not fall within the scope of what GFCIs are designed to do. Their specific role is centered on safety through monitoring current flow and providing rapid disconnection of the power supply when necessary.