You would use the 208 voltage which is a three phase voltage,
the 120 volts is each leg to ground or star point. The formula for
Amps = kw x 1000/1.73 x Volts x pf. Pf = power factor.
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∙ 15y ago
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Q: How many amps does 42kw in a 3 phase system 120208 convert to?