What is the purpose of a ground fault circuit interrupter (GFCI)?

A ground fault circuit interrupter (GFCI) is designed specifically to enhance safety in electrical systems by protecting individuals from electrical shock. It does this by monitoring the electrical current flowing through the circuit. If it detects an imbalance—such as in the event of a ground fault, which occurs when electrical current finds an unintended path to the ground—it will quickly shut off the power to the circuit, often within milliseconds. This rapid response greatly reduces the risk of electrical shock or electrocution, making GFCI devices essential in areas where water is present, such as bathrooms and kitchens.

The other choices do not align with the core purpose of a GFCI. Increasing electrical flow during peak hours is not relevant to its function. Minimizing energy loss relates more to efficiency rather than safety, and ensuring proper grounding of devices does not capture the proactive nature of GFCI, which specifically focuses on detecting and interrupting ground faults to prevent injury.