How to Wire a 220V Outlet (with Pictures) - wikiHow MethodTipsWarnings Turn off the main power on your circuit breaker box. Open the door on the circuit breaker box in your home, usually located in a basement, hallway, or kitchen. Look for the breaker switch that controls all the power in your home, which should be alone on either the top or side of the box. Flip the switch to the Off position to cut the power to your home so it’s safe to work on your Make a hole in the wall where you plan to install the 220 outlet that matches the size of the outlet boSee all 8 steps on wwwhow Understanding 220 and 230 Volt Wiring | DoItYourself Wiring residential homes with 240 volts is a necessity, for powering some heating and cooling equipment as well as some large appliances. The 220-volt circuits as they were known prior to the 1960s are now commonly known as 240-volt circuits and 110-volt circuits are now 120-volt circuits. How do I wire up my 220v split AC unit? | Yahoo Answers The AC unit needs 220V. So I will need the red and black wire from the 220V outlet. The AC unit's wiring diagram shows that it need a ground to screws into the metal of the AC unit along with the units green wire. The problem is that the kitchen stove outlet does not have ground. It only has the two power lines and a neutral.