I am looking to buy a window air conditioner. I would like the get the most powerful air conditioner my electrical system can support. I have this plug on my wall:
I have never seen this plug before, but based on the size and shape I think it may be a NEMA 6-30. The round outlet face is 2 and 1/8 inches and each prong opening is about 9/16ths of an inch:
I have not found any air conditioners with this specific plug shape and size. Would I be able to plug in an air conditioner with a different plug using some sort of adapter?