How to Wire a 230-Volt Electrical Outlet | Hunker The cable you need for 230-volt wiring includes two hot wires, a neutral and a ground. The wire is 10-gauge or thicker, which makes it hard to bend. For this reason, you should crimp wire lugs onto the ends of the wires before connecting them to the receptacle. This ensures secure connections. 3 Wire 220V Wiring Diagram - Wiring Diagram And Schematic Description: How To Wire 240 Volt Outlets And Plugs within 3 Wire 220V Wiring Diagram, image size 750 X 328 px, and to view image details please click the image. Here is a picture gallery about 3 wire 220v wiring diagram complete with the description of the image, please find the image you need. How to Wire a 4-Prong 240-Volt Twist-Lock Plug | Hunker How to Wire a 4-Prong 240-Volt Twist-Lock Plug The first thing to appreciate is that 240 volts is equivalent to 250, 230 and 220 volts in the world of residential wiring. The different numbers only reflect the variability of the voltage passing through residential circuitry.Author: Chris Deziel