Jan 31, 2006 / 3 phase problem #21 B billbill1 Veteran Member Joined Oct 13, 2004 Messages 1,207 Location Lecompton, Kansas Tractor 2016 Mahindra 1533 Shuttle AgKing 2840 shuttle shift volts X amps, X effiency,X powerfactor, X 1.73, divided by 746 = horsepower on a 3 phase motor.