If a 2 or 3 pull 20 amp breaker has 12 amps on each phase, how is the total amp per phase not added up?
In: 0
Poles.
Each phase may pull a different amount of current, but the amount you are “reading” on a meter is the RMS value (Root Mean Square) which is a fancy way of saying its the “average” amount of power.
Since the different poles are out of phase with each other (cycling at different intervals) the actual total amperage in the circuit is not going to be the total of all three phases.
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