You should not need a wiring diagram. if the generator has a star point (wye) connection then the phase voltage to ground (star point) is 277 volts. 480/1.73 = 277. I have to hook up a 50hp 480v motor, the schematic is gone. the 6 leads are what's throwing me. i can make out on the tag that the motor is dual voltage. Wiring Diagram 480v Motor.