Yes, a GFCI outlet can easily be wired incorrectly, which is one of the most common mistakes in residential electrical work. The most frequent installation error is reversing the incoming power feed wires from the electrical panel, connecting them to the LOAD terminals instead of the LINE terminals. Other common mistakes include swapping the hot and neutral wires or failing to connect the bare copper ground wire to the green grounding screw, which compromises personal safety protection. Verification: Plug a GFCI circuit tester into the receptacle to verify correct wiring polarity and confirm that the test button successfully cuts power.
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