16 1 2 Hp Well Pump Amp Draw References. Divide the wattage by the voltage. How many amps does a 1 1 2 hp well pump draw?

When delivering 1/2hp to the pump, it draws 5.0 amps. 5.0 amps when delivering 1/2hp to the pump, it draws 5.0 amps. The amount of power the submersible well pump requires is determined by its flow rate and lift height.

