Which of the following statements best describes a GFCI outlet?

A GFCI outlet, or Ground Fault Circuit Interrupter outlet, is specifically designed to provide protection against ground faults. This is achieved by continuously monitoring the electrical current flowing through the circuit. If it detects an imbalance between the outgoing and incoming current, which indicates a ground fault—such as current leaking into a person or the ground—it will quickly interrupt the circuit, cutting off the flow of electricity. This rapid response helps prevent electrocutions and electrical shocks, making it a critical safety device, particularly in areas where water and electricity might come into contact, such as kitchens and bathrooms.

The other options do not accurately describe the primary function of a GFCI outlet. Volts are regulated by different devices and are not the responsibility of a GFCI outlet. While it is true that some circuits in residential settings are required to have GFCI protection, it is not mandated for every situation or for every outlet in a home. Additionally, GFCI devices can be installed as outlets or as part of circuit breakers, rather than being limited to just one of those forms.