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

The function of a Ground Fault Circuit Interrupter (GFCI) is to detect ground faults and cut power rapidly. GFCIs are designed to protect individuals from electrical shock in situations where current is leaking to the ground, often due to a faulty electrical device or wet conditions. When the GFCI senses an imbalance between the outgoing and incoming current, which typically indicates a ground fault, it rapidly disconnects the power supply. This quick response can prevent severe injury or even death from electrical shock, making GFCIs an essential safety feature in areas such as kitchens, bathrooms, and outdoor outlets where water is present.

The other options do not accurately describe the purpose of a GFCI. Enhancing power supply, increasing current flow, or monitoring voltage levels do not align with the GFCI's primary safety-related function, which focuses exclusively on detecting ground faults to ensure safe electrical usage.