Nope always go by the RMS value its the effective working voltage that's were the 70 percent term comes from if you ever heard of it.
in my case its 120v x 0.7071 = 84.852v not 120v when you say 120v that's the peak voltage not the real effective voltage after its been loaded down also try to run the miners on a sub breaker by themselves.
or power wise just do this 120v x 20amps = 2400w then 0.7071 x 2400w = 1697.04 watts. The 1697.04 watts is the real working effective power not 2400 watts. that's why it burnt up you overloaded it. things burn up when there overloaded.
Just do not exceed 1697.04 watts on one sub breaker.
"In the United States[8] and Canada,[9] national standards specify that the nominal voltage at the source should be 120 V and allow a range of 114 V to 126 V (RMS) (−5% to +5%)"
We're at 230 V +10%/−6% I think, I'm in Norway btw!
Haven't heard about the 70%, but I've heard about the 80% ^^
Edit: I'm measuring 225-233V at the socket, depending on time of day.
dog: would love your input here: https://bitcointalksearch.org/topic/preparing-small-s7-setup-grandpas-basement-1171818 , and maybe this thread won't go too off-topic.
