ECN Forum Forums General Topics of the Trade General Discussion Area How does an Air Compressor draw...

When trying to convert between W and HP - remember the 746W/HP is for INPUT watts while the motor nameplate is OUPUT horsepower so you need to include the efficiency and the power factor into your calcualtions.

1-ph Nameplate HP = (E x I x %eff x PF)/746
1-ph Input Amps = (HP x 746)/(E x %eff x PF)