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AC  Equations
DESIRED DATA	ALTERNATING CURRENT			DIRECT CURRENT
	Single-Phase	Two-Phase* Four-Wire	Three-Phase
Amperes when kva is shown	kva x 1000 E	kva x 1000 2 x E	kva x 1000 1.73 x E	kva x 1000 E
Amperes when kilowatts are shown	kw x 1000 E x pf	kw x 1000 2 x E x pf	kw x 1000  1.73 x E x pf	kw x 1000 E
Amperes when horsepower is shown	hp x 746   E x %Eff x pf	hp x 746     2 x E x %Eff x pf	hp x 746      1.73 x E x %Eff x pf	hp x 746 E x %Eff
Kilovolt-Amperes	I x E 1000	I x E x 2 1000	I x E x 1.73 1000	I x E 1000
Kilowatts	I x E x pf 1000	I x E x 2 pf 1000	I x E x 1.73 x pf 1000	I x E 1000
Horsepower	I x E x %Eff x pf 746	I x E x 2 x %Eff x pf 746	I x E x 1.73 x %Eff x pf 746	I x E x %Eff 746
OHMS LAW  Volts (E) = Amps (I) x Ohms (R) Amps (I) = Volts (E) / Ohms (R) Ohms (R) = Volts (E) / Amps (I)   R=Ohms, E=Volts, I=Amperes POWER - AC CIRCUITS Efficiency = 746 x Output HP / Input Watts 3ø KW = Volts x Amps x PF x 1.732 / 1000 3ø Amps = 746 x HP / 1.732 x Eff. x PF 3ø Eff. = 746 x HP / 1.732 x Volts x Amps x PF 3ø PF = Input Watts / Volts x Amps x 1.732 1ø KW = Volts x Amps x PF / 1000 1ø Amps = 746 x HP / Volts x Eff. x PF 1ø Eff. = 746 x HP / Volts x Amps x PF 1ø PF = Input Watts / Volts x Amps HP (3ø) = Volts x Amps x 1.732 x Eff. x PF / 746 HP (1ø) = Volts x Amps x Eff. x PF / 746 1 KW = 1000 Watts   Eff. = Efficiency, PF = Power Factor KW = Kilowatts HP = Horsepower

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