Useful charts
Voltage Drop
Power Factor
Electrical Formulas
Cable Rating
ELECTRICAL FORMULAS To Obtain SINGLE PHASE (Alternating Current) THREE PHASE (Alternating Current) Kilowatts V x l x pf 1000 1.732 x V x l x pf 1000 kV•A V x l 1000 1.732 x V x l 1000 Amperes (kW known) kW x 1000 V x pf kW x 1000 1.732 x V x pf Amperes (motor hp known) hp x 0.746 V x pf x Efficiency hp x 0.746 1.732 x V x pf x Efficiency Amperes (kV•A known) kV•A x 1000 V kV•A x 1000 1.732 x V Horsepower (kW unknown) kW 0.746 x Efficiency (Generator) kW 0.746 x Efficiency (Generator) Horsepower (generator efficiency unknown) kW 0.746 x 0.93 kW 0.746 x 0.93 kW input (motor hp known) hp x 0.746 Efficiency (Motor) hp x 0.746 Efficiency (Motor) kW input (motor efficiency? unknown) hp x 0.85 hp x 0.85