What's the formula for determining the line current of a 3 phase motor when the horsepower is known?

Question

Or the ampere load.

Answer 1

746 per horsepower divided by your line voltage time 1.732

Answer 2

Amps = HP * 746 *100 / (1.73 * volts *efficiency * power factor)

Answer 3

Well, formula for True Power (Watts);

Pt=(√3)(E)(I)cos0

                where: Pt = true power (watts)

                           E = Line Voltage(Volts)

                            I = Line Current (Amperes)

                     cos0 = Power Factor of your system

                      Eff.   = Efficiency of the system

since 1Hp = 746 watts we have:

I = (Pt)(746)(100) / (√3)(E)(cos0)(Eff) amperes  <<<-------ans.