Question: how to calculate electrical load in ampere?
Answer: I(A) = P(W) / (√3 × PF × VL-L(V) ) So amps are equal to watts divided by square root of 3 times power factor times volts. amps = watts / (√3 × PF × volts) or. A = W / (√3 × PF × V) Example. ...  I = 330W / (√3 × 0.8 × 110V) = 2.165A. Amps calculation with line to neutral voltage.