Joe livewire
Member
My question is if you have a single phase 240 volt hot water heater with dual 4500 watt elements.And when it is on how many amps per leg would you have.This is what i came up with. 18.75 per leg at 240 volts = 9000 watts is this correct and if so how come it takes 9000 watts to operate a 4500 watt heating element. is it do to the heating of the element. because the name plate says its a 4.5kw heater. And if this is correct on my calculation in the code book it says use the name plate value,help please......