A 120/208 volt, 3 phase transformer secondary supplies the following dweling unit load. 120/208 volt, single phase 150 amp terminations are rated at 75 degrees C. What is the minimum size type THWM aluminum conductor which ca n be used for the ungrounded service conductors to this dwelling unit?

A 120/208 volt, 3 phase transformer secondary supplies the following dweling unit load. 120/208 volt, single phase 150 amp terminations are rated at 75 degrees C. What is the minimum size type THWM aluminum conductor which ca n be used for the ungrounded service conductors to this dwelling unit?