Why are GFCIs considered necessary?

GFCIs, or Ground Fault Circuit Interrupters, are considered necessary primarily because they provide protection against electrical shocks that can occur due to moisture hazards. These devices are designed to monitor the flow of electricity and quickly shut off power if they detect any imbalance, which might indicate that current is escaping the intended circuit, potentially through water or another conductive path.

This capability is particularly crucial in areas where electrical outlets are likely to be exposed to moisture, such as kitchens, bathrooms, and outdoor locations. By interrupting the circuit in the event of a ground fault, GFCIs significantly reduce the risk of serious injury or fatality from electrical shocks. Therefore, their presence in residential and commercial wiring is a vital safety feature mandated by electrical codes in many regions.