I have a 220 line on my deck for a hot tub.
I considered making a shelter and doing some outside mining this winter.
I think my biggest hurdle would be condensation.
I have plenty of room for miners in safer places, but I'm sure I'll experiment at some point.
If you are building an enclosed space for the miner, like a shed, maybe you could get away with buying a de-humidifier?
Dehumidifiers suck down obscene amounts of electricity. They're basically air conditioners, but they don't push the warm air outside. Given that, you may's well just use an air conditioner.
The problem was the humidity. Air conditioner doesn't remove water vapour from the air, in fact it may even increase RH which is the bad thing.
There are dehumidifiers with very low power consumption. You would need to make a balance, what is worth more, replacing expensive hardware due to corrosion or paying a little extra for electricity?
It was just a thought anyway.