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The purpose of a GFCI (Ground Fault Circuit Interrupter) is to act as a fast-acting circuit breaker that senses small imbalances in the electrical circuit. When a ground fault, such as current leakage to the ground, is detected, the GFCI reacts within a fraction of a second by shutting off the electricity flow. This rapid response helps prevent electrical shocks and potential hazards by cutting off the power supply quickly.
In simpler terms, a GFCI is a safety device designed to protect people from electrical shock by monitoring the flow of electricity in a circuit. If it detects a fault, like when someone touches a live wire, it immediately interrupts the power, reducing the risk of injury or fire.
Remember, GFCIs are commonly used in areas where water and electricity could come into contact, such as bathrooms, kitchens, and outdoor outlets, to enhance safety and prevent accidents.