Wiring a 220v outlet or receptacle at home can be difficult if you have no prior experience in home electrical wiring. There are all kinds of confusion with using an 110V Home Appliance with a 220V Outlet. If you have no prior experience on home electrical wiring then do not try it yourself. Take help of a professional electrician.
Why 220v Wiring
Most people in the United States and other countries using appliances to be used with normal 110v receptacles are familiar with the 110v wiring. However, many people have little or nor experience with 220v wiring and there are lots of confusion with this. 220v electricity is needed mostly for with higher amp. Some examples of such appliances are clothes dryer, washing machine, sump pump motor, air compressor etc. Some of these appliances come with a 3-plug end. Some come without any plug end and have 2, 3 or even 4 wires.
Wiring Accessories and Hardware needed to Wire a 220V Outlet
In order to do a 220v wiring outlet, you need following:
- Wires (of required colors) to run it down from the main panel or sub panel to the receptacle box.
- PVC conduit.
- A receptacle box, a cover plate, receptacle, and few other wiring accessories.
Points to remember:
- When buying a receptacle, make sure you get the right one for your application. There are several styles of 220v receptacles available. Standard outlets with three prongs are most common.
- Wire Gauge: Wires of different gauge are available. Because 220v is needed for high-power appliances, you need to get a heavier gauge wire, say 10 gauge or above.
How 220v works with a 3 wires:
- The Black wire carries 110v
- The Red wire carries 110v (you can also use white wire or wire of any color, but mark it RED with electrical tape for your own convenience)
- The Green wire acts as ground or common
- The White wire acts as common
Wiring a 220v Outlet
Wiring a 220v outlet if you have 3 wires in the main panel:
- Connect the RED, BLACK and GREEN wires in the main panel to the 3 prong receptacle.
- Extend the wire to the location you want the outlet.
Wiring a 220v Out let if you have 3 wires in the main panel:
- Connect green wire to green, black to black, red to red and white to white. Connect the other ends of the wires accordingly to the 3 prong receptacle. If there is no GREEN in the receptacle, connect the wire to any of the mounting screw between the receptacle and the plastic box.
- Use a voltmeter to test the voltage at the receptacle once the wiring is complete. There could be some variation say ± 5v to 10v, but this can be considered normal.
Wiring a 220v outlet or receptacle can be easy if you have prior experience in home wiring. However, if you have nor prior experience, then do not do it yourself; get help from a professional. Some of the codes and rules mentioned here may differ in different countries but the basic principle of home wiring is more or less the same around the world.
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