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AC Efficiency and Power Factor Formulas

To Find	Single Phase	Three Phase
Efficiency	746 x HP E x I x PF	746 x HP E x I x PF x 1.732
Power Factor	Input Watts V x A	Input Watts E x I x 1.732

Power – DC Circuits

Watts = E xI

Amps = W / E

Key:
E = Voltage	I = Amps	W = Watts
PF = Power Factor	Eff = Efficiency	HP = Horsepower

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