What must be done when replacing a 2-prong ungrounded wall receptacle with a 3-prong GFCI receptacle?

When replacing a 2-prong ungrounded wall receptacle with a 3-prong GFCI receptacle, it's essential to label the receptacle to indicate that it is not grounded. The GFCI (Ground Fault Circuit Interrupter) offers protection against electrical shock by monitoring current flow; however, it does not provide a ground path.

By labeling the receptacle, you inform users that while the GFCI can protect against ground faults, it does not mean that the outlet is grounded. This is crucial for safety, as users may assume that the presence of a 3-prong receptacle indicates that the outlet is properly grounded. The labeling helps maintain clarity regarding the outlet's status, preventing potential misuse.

Grounding the receptacle is not viable without running a new ground wire, which alters the typical installation requirements. Meanwhile, requiring a circuit breaker in this context isn't necessary, nor is it related to the need for a label. Covering the receptacle would not address the issue at hand involving user awareness and the safety implications of the ungrounded status.