Understanding the Basics of a 4 Wire 220 Outlet Diagram. A 4 wire 220 outlet diagram is a helpful visual representation that illustrates the different components and connections involved in a 220-volt electrical outlet. This type of outlet is commonly used for appliances and equipment that require a higher voltage than the standard 120-volt outlet.. Pops and I move a light switch and show how it all wires up to run the 220V side of the High Output lamps in his garage. I chopped up about a 3 hour project.
On the inside of the switch cover there should be a wiring diagram you will be able to follow. There will be two sets of wires, ones coming from the electrical panel and ones coming from the motor. The power wires will land on the outer two most screws labeled L1 and L2, and the motor wires will land on the center two screws labeled T1 and T2.. When wiring a 220 switch, it's common to use two-conductor cable if the appliance has no auxiliary 120-volt functions. This type of cable includes a black wire, a white wire, and a bare wire. It's important to remember that because this is a 220-volt circuit, the white wire is hot, not neutral as it would be in a 120-volt circuit.