Tips for Wiring Electrical Outlets and Switches

GFCI (Ground Fault Circuit Interrupter) outlets have special terminals marked line and load. If the wires are providing power to extended outlets further down the circuit, the wires are connected to the "load" terminals. If the wires are for the hot and neutral incoming power wires, then they get connected to the "line" terminals.

Marking the wires before you disconnect the GFCI outlet is a great way to avoid mis-wiring the outlet once it has been removed.