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

The primary function of a Ground Fault Circuit Interrupter (GFCI) is to protect against electrocution. GFCIs are designed to monitor the electrical current flowing through a circuit. If the GFCI detects a discrepancy between the outgoing current and the returning current, which may occur if there is a ground fault (for example, if electrical current is flowing through a person who is grounded), it quickly interrupts the circuit. This rapid response helps to prevent serious injury or death due to electrical shock.

In settings such as kitchens, bathrooms, and outdoor locations where the risk of moisture is higher, the use of GFCIs is especially crucial because water increases the likelihood of electrical shock. Thus, the implementation of GFCIs can significantly enhance electrical safety by mitigating the risk of electrocution in environments where individuals are likely to come into contact with both electricity and water. This is why the correct choice emphasizes the protective role of GFCIs.