What can GFCI receptacles protect when properly wired?

GFCI (Ground Fault Circuit Interrupter) receptacles provide essential protection against electrical shock by interrupting the circuit if they detect an imbalance in the current, indicating a possible ground fault. When properly wired, GFCI receptacles can protect not only themselves but also any downstream receptacles that are connected to the same circuit. This means that if a GFCI receptacle is installed at the beginning of a circuit, it will safeguard all outlets that are wired after it (downstream) on that circuit.

This capability is particularly important in areas where electrical equipment may be used near water, such as kitchens, bathrooms, or outdoor locations, helping to ensure a higher level of safety against the risk of shock. Any outlets that are not properly connected to the GFCI receptacle or are upstream of it would not receive this protection.

In contrast, not all outlets are protected by GFCI receptacles; only those that are downstream or directly connected to the GFCI output will have that coverage. Thus, the focus on the downstream receptacles captures the essence of what GFCI receptacles can do effectively when installed correctly.