![]() ![]() Generally, these generators are limited in the amount of power they can provide, often maxing out at 30-amps (or 3,600 Watts).įrom left to right: 50-amp, 30-amp, and 15/20-amp connections at a power pedestal. That means that they can only supply a single 120V AC leg, not two separate 120V legs. That’s the same 12,000W (100A x 120V = 12,000W), just split up a little differently.īut most smaller generators are only single phase, not split-phase. But your 120V, 50-amp RV will really be using the power as 100Amps (2 x 50A legs) at 120V. So, a 50-amp circuit can supply 50 amps at 240V, which is 12,000 Watts (Watts = amps x volts, so 50A x 240V = 12,000W). And the other half of your RV uses the other 120V, 50A leg. So, half of your RV’s 120V AC electrical devices usually run from the power supplied by one 120V, 50A leg of the outlet. At their peak + or – voltage, the difference measured between them is 240V.ĥ0-amp RVs are typically wired to utilize each 120V AC line supplied at the pedestal to power a portion of the outlets/appliances onboard. Graph showing two legs of 120V AC power that are 180-degrees out of phase with each other. What does it mean to have power that’s 180 degrees out of phase? Good question! Remember, the “AC” part of “120V AC” power stands for “Alternating Current.” The power coming from the outlets in your house is sine-wave power – voltage cycles from +120V to -120V and back again in a steady curve called a sine wave that looks like this: ![]() That means that there are two AC “hot” lines, each delivering 120 volts of AC power which are out of phase from each other by 180 degrees (when measured with respect to the neutral, while measuring across the two hot legs would show 240V AC), along with a common neutral wire and a ground wire.
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