What is the primary function of a GFCI on an apparatus?

The primary function of a Ground Fault Circuit Interrupter (GFCI) on an apparatus is to prevent electrical shock. GFCIs are designed to monitor the flow of electrical current and detect even small imbalances between the outgoing and incoming current. If an imbalance is detected—such as when current is leaking to the ground or when a person comes into contact with a live wire—the GFCI rapidly disconnects the power to prevent severe injury or electrocution. This is particularly critical in environments where water is present, as moisture increases the risk of electrical shock. By ensuring that the electrical system shuts down swiftly in the event of a ground fault, GFCIs significantly enhance safety for operators and maintenance personnel working with apparatus that may be exposed to wet or damp conditions.