What is the primary function of GFCI outlets?

The primary function of GFCI outlets is to protect against ground faults and electrical shock. Ground Fault Circuit Interrupters (GFCIs) detect imbalances in electrical current flowing through a circuit. If the current flowing through the hot wire differs significantly from the current returning through the neutral wire, typically indicating that some of the current may be leaking to the ground, the GFCI quickly interrupts the circuit. This mechanism significantly reduces the risk of electric shock, particularly in areas of the home where water is present, such as kitchens and bathrooms.

This protection is crucial because it can prevent serious injuries or fatalities from electrical shocks, making GFCI outlets a vital safety feature in residential electrical systems. Other options related to increasing current strength, energy efficiency, or resisting overheating do not pertain to the primary role of GFCI outlets, highlighting that their main purpose is focused solely on safety regarding ground faults.