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You could use a transformer in theory if a 200 volt ac unit is single phase. You must mean a 220 unit. 120 uses 3 wires, hot neutral and ground. 220 has two hots a neutral and a ground. A 2 phase motor is more economical than a single phase motor. That is why all larger units are 220. I have seen people change the breaker to a 220 and use the ground as a second hot to avoid the cost of rewiring, but don;t do it. It is against building codes ,and you don't want to break the law, not to mention it is a fire hazard. Long story short, how can I use an appliance made for 220 with a 120 source, you can not. The larger unit draws more current than a 120 can supply. If you found some way to wire it the wires will heat up and if your breaker fails you have a fire. Ignorance is not covered by home owner insurance.

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16y ago

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