Im looking for a calculation for Full Line Current but I only have a voltage rating of the motor and the Horsepower any suggestion ??

 

What HP and voltage? If you know the efficiency and power factor ratings you could use (HPx746)\(Voltagex1.73xEfficiencyxPF). Table 430.250 from the NEC will also give you a rating.

 

it is usually assumed that the power factor and efficiency of a three phase motor are 0.8 and 0.85 respectively.
I hope it helps

 

A rule of thumb we used is 1-1/2 amps per horsepower at 480VAC 3 Phase. Not exact, but pretty close.