I built a new home and knew I wanted 220 in the garage for. The builder asked if I wanted to maintain the old 3 post 220 or the new 4 post. His indication was the 4 post 220 is the new standard and all newer equipment will be going to this, so it made sense at the time to go with it. I now find very little that has switched over and there is no adapter available, that I can find. So, thanks to the “professional” contractor’s advice I now have basically unusable 220 power in my garage I paid extra for, Dang it! Any suggestions?
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4 post 220 volt question