I'm not an electrician, so this may be a stupid question.
But you're allocating 120 amps to mining in your house. Most homes have 200 amp service and panel. I'm no math wiz either, but that's 80 amps for your home? If you have a heat pump, electric range, and dryer. Aren't you stretching your electrical budget for the rest of the home?
Are you pulling in new service from the street?