Given: A 120/208 Volt 3 phase transformer secondary supplies a dwelling unit load of 120/208 single phase 150 amps with terminations rated at 75 degrees Celsius. What is the minimum size of type THW aluminum conductors which can be used for the ungrounded service conductors.

Given: A 120/208 Volt 3 phase transformer secondary supplies a dwelling unit load of 120/208 single phase 150 amps with terminations rated at 75 degrees Celsius. What is the minimum size of type THW aluminum conductors which can be used for the ungrounded service conductors.