I have some mining hardware and it's been running on 120v outlet for like 1.5 years and it works but the power wires are always warm and I've had to replace several that have burnt out, no fire or sparks because I monitor them daily. I'd like to have them plugged into a 240v outlet as the power supply works on either and will only draw half the amps as right now (11.5A on 120v 15A breaker, on 240v it should be about 5.8A) so it should in my mind run the wires cooler and therefore safer.
So I want to install a NEMA 6-20R like this one on a 25A breaker with 10 awg wire
https://www.amazon.com/dp/B000U39UY4/ref=cm_sw_r_cp_awdb_imm_Z1BQG1CCCRYGSYJ078KE?_encoding=UTF8&psc=1
I know the 20 in 6-20 is 20 amps so does that mean I can plug in 2 miners that draw 1300w each and be good?
Also is it allowed to run these in line with each other? Like if I install 2 next to each other in a box can I run one off of the other to power 3 devices in total. If so what wire gauge and breaker is needed?
Or do I need to install a new breaker and new wires for each outlet? Because I only have space in my breaker box for one 240v breaker, so I'm trying to figure out how to power 3 miners off that one breaker position.
Best Answer
That panel is already populated with many double-stuff breakers, so no loving there for making more room. Unless you are willing to replace the entire main panel with one that has more spaces, your best bit (A little IT slang there!), would be to install a sub-panel. Feed it from the last remaining 240 v space with a capacity appropriate for your bitcoin miners and lots of reserve. Go big. Follow all the rules for a sub-panel (isolated neutral from ground, etc.). Then you can run your miners at 120 or 240 from the sub-panel.