Question for US miners, I have a unused 20 Amp double pole breaker in my panel. I know it will provide 220V. Any issues hooking up my miners to a circuit with 2 hots and a ground?
You need to check how is the breaker connected. are both poles hot or 1 is hot with the other to neutral? Normally it should be 1 hot and 1 N and both switches are connected externally. if your hot input is 110v, than you have 110v output too, plus N of course.
this is viable as the inside of the breaker box can be such that one of the 2 hot bars may be shorter then the other.
let me see if I can find a photo
https://www.hunker.com/12185669/how-to-install-220-volt-electrical-circuit-breakersbest I can find.
please be very careful 220/240 = strong powerful possible death