DC watts to amps: I(A) = P(W) / V(V)
AC single phase watts to amps: I(A) = P(W) / (PF × V(V))
AC three phase watts to amps with line to line voltage: I(A) = P(W) / (√3 × PF × VL-L(V) )
AC three phase watts to amps with line to neutral voltage: I(A) = P(W) / (3 × PF × VL-N(V) )