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The main benefit of using GFCI (Ground Fault Circuit Interrupter) outlets is their ability to protect against ground faults and electrical shock. These outlets are specifically designed to detect imbalances in electrical current, which can occur when electricity flows through an unintended path, such as through water or a person. When a ground fault is detected, the GFCI outlet quickly cuts off the electrical supply, significantly reducing the risk of electric shock or electrocution. This feature is particularly important in areas where water is present, such as kitchens, bathrooms, and outdoor settings, where the risk of electrical hazards is higher.

The function of GFCI outlets is vital for safety; they are not designed to provide stronger currents or reduce electromagnetic interference. Additionally, while they are an essential safety feature, not all electrical devices use GFCI outlets, as they are specific to certain applications where their protective qualities are needed.