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The primary safety function of a GFCI (Ground Fault Circuit Interrupter) outlet is indeed to prevent electrical shock, particularly in areas that are prone to moisture, such as bathrooms, kitchens, and outdoor locations. GFCIs are designed to detect imbalances in electrical current, specifically when there is a leakage of current that might flow through a person's body to the ground. When such an imbalance occurs, the GFCI responds quickly by cutting off the electricity supply, which significantly reduces the risk of severe electric shock or electrocution.

This is particularly critical in wet environments since water can increase conductivity and the likelihood of accidental shocks. The rapid response time of GFCI outlets makes them effective safety devices in preventing potentially fatal accidents. Understanding this function emphasizes the importance of installing GFCI outlets in the recommended locations to enhance electrical safety.