How to Replace a 120-Volt Electrical Wall Outlet
Step 5: Disconnect Wires from Old Receptacle
Loosen the screws holding the wires, and gently remove the wires from the screws. If the wires were installed in the back of the receptacle using push-in terminals, insert a small, slotted screwdriver in the slot next to each terminal to release the wire.
Be careful with the wires; if they’re undamaged, you can use the exposed ends again. If the ends of the wires are frayed or broken, snip them back and strip off the sheathing with wire strippers to expose about 1/2″ of bare wire.
Now’s a good time to take a look inside your electrical box, and vacuum it out if it’s dirty. If there are any connections inside the box, check the wire nuts to make sure they’re tight.