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What wire size is needed for a 230 volt window air conditioner?
Wiki User
∙ 14y ago
This is tricky. Most houses in the US haves 120/240 volts. The 240 volts is done by getting 120 volts from each leg of the panel. (The three wires going in to the panel are 120-A, 120-B, and neutral. 120-a is "black", 120-b is "red" The 120Volts on each leg is compared to the neutral leg. The 240 volts is gotten from leg to leg. Putting a breaker in the panel and running the wire is not something you should do by your self if you are asking this question.
If you short something in the main panel, you could kill yourself and ruin your panel.
The panel is replaceable.
Before you hire an electrician or a handy man, ask them if they are familiar with NFPA 70.
If they have a sense of self preservation and some basic training, they will say something like there is no reason to work on your panel hot.
Good luck
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoThat depends on the current draw of the AC unit.
If it's pulling over 30 AMPS you'll need a 40 AMP breaker and 8 GA wire.
If it's pulling over 20 AMPS you'll need a 30 AMP breaker and 10 GA wire.
If it's pulling UNDER 20 AMPS you'll need a 20 AMP breaker and 12 GA wire.
If it's pulling OVER 40 amps... hire an electrician.
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