Updating electrical to 220 volt
If the home was recently built, the answer is almost always yes.
Most houses today have two 110 volt wires and one neutral wire running into the house from the local distribution system. If there are two 110 volt wires running to the house, then the house has 220 volt service and appliances, such as dryers and air conditioners.
If needed, cut away the existing exposed wire and use the wire strippers to strip about 3/4 inch of new insulation away from the ends of the wires. It is the silver bar with a lot of screws in it; plus, you'll see all of the other white wires connected to it.
Loosen one of the unused screws and insert the tip of the white wire under it.
Pull the outlet out from the wall gently and slowly, letting the wires stretch as you pull.
Modern dryers, stoves, hot water heaters and other appliances all use the high voltage standard, which can deliver twice as much as the 110 volts used by computers, televisions, smaller appliances and other electronics.
So what else do you need to know about electric systems?
While it’s best to leave the big questions to electricians, these are some basics that you should know.
Looking at the new outlet, each screw will be colored, or the name of each screw post will be molded into the plastic near each screw.
Four-wire outlets connect as follows: Black goes to negative, red goes to positive, white goes to common, and green goes to ground.