How to Wire and Install an Electrical Outlet - The Spruce Author: Timothy Thiele Outlet Wiring Basics. Wiring and installing an electrical outlet is an easy do-it-yourself project. Safety Considerations. 000000000000The wire connections for outlets must be made carefully to Tools and Materials You Will Need. Non-contact voltage tester. Cable ripper. Cutting pliers or utility Turn Off the Power. Locate your home's electrical service panel. Also known as a breaker box or See all full list on thespruce Wiring Diagrams for Electrical Receptacle Outlets - Do-it Wiring a 20-Amp 240-Volt Appliance Receptacle. This outlet is commonly used for a heavy load such as a large air conditioner. The outlet should be wired to a dedicated 20-amp/240-volt circuit breaker in the service panel using 12|2 awg cable. With this wiring, both the black and white wires are used to carry 120 volts each and the white wire is wrapped with electrical tape to label it hot.