What pikachu said, plus:
The (US) national electric code says the maximum CONTINUOUS current draw is 80% of the breaker rating. In this case, the highest continuous current for a 15 amp breaker is 12 amps total. Don't forget to include anything thing else on the breaker like lights or electronics.
If you are going into full power extraction mode, you might want to check that the labeling on your junction box is correct. If a particular breaker has scattered outlets, you may want to also map them out.
One last thing, I would talk to an electrician if you house has 14 gauge aluminum wiring. This is a problem.
Thank you for all the wonderful Info. My house was just built in dec 2016, hopefully its uptodate to code standard.
I think the only stuff built to withstand miner requirements are dryer & electric oven power lines. 220v lines. They have thicker gauge wires and more amps on circuit breaker.
using 110v power supply at high wattage at constant peak usage over long distance (from circuit breaker) is bad. Not a electrician, but I believe new wiring won't forgive mining requirements and laws of physics. Stick with the dryer power lines or pull new 220v lines.
I use 20amp 12awg wire to 220v outlets..if possible and you have like smaller 14 awg wire just replace a circuit or hack something together thru a piece of electrical conduit and replace and patch
when home mining is done
lots of youtube videos on such
anyway my basement stuff is all done on the above....all 220v
edit: by replace above I mean replace 14 awg wire and 15 amp breaker from box to 220 outlet with 12 awg wire and double pole 220v 20 amp breaker....you can use regular
awg 15 wire ..just mark the white wire at both ends (box and outlet) with black elec tape as they are both no hot thru the double pole breaker)
again youtube videos show all this..just edited to clarify