I have a single phase 220 volt air conditioner installed in my workshop (garage) and I need to run power to it. A sticker on the AC says to use a 20 A circuit breaker (got it). The run is up into the un-insulated area above the garage and then down through an uninsulated wall to the panel for a total run of about 50 feet. What wire do I need to run? Any other questions I need to ask and consider.

Thanks in advance.

Bill Clifton