Other problems for replacing outlets come from forgetting to reattach a wire or attaching it in the wrong place.
The number, color, and function of the wires at an outlet can be confusing if the original connections are lost track of.
Replacing outlets with safer GFCI outlets is a simple project for beginner DIYers to bring their kitchen and bathroom outlets up to code.
One GFCI outlet at the beginning of a circuit protects all the remaining outlets on that circuit. If the circuit breakers aren't labeled, you can locate the proper switch by plugging a radio into the outlet you plan to change. Then place a piece of tape over the switch to make sure no one accidentally turns it back on while you're working on the outlet.
Hint: attach the two wires which come from the same cable as each other to the two screws that are the same color as each other.
Consult my diagrams relating to Three-way switches.
The outlet may also indicate appropriate color connections.
That screw is meant to be given a (bare) ground wire attached to the bundle of grounds, if any, back in the electrical box.A GFCI outlet, properly installed, will protect all the outlets on the "load" side.If there are only two insulated wires entering the box this receptacle is at the end of the circuit. Turn the power back off and test the wires with the circuit tester to make sure the power is off.If there are two pairs of wires entering the receptacle's box, separate the wires from the box into two pairs of one white wire and one black wire.Make sure each pair of wires enters the outlet's box in the same spot.