In a 480 to 120/208-volt wye transformer supplying a 3Ø load with 75 amps of coil current, how much current flows in each circuit conductor to the load?

In a wye transformer configuration, the line current entering the transformer is the same as the phase current delivered to the load. When a three-phase load is supplied from the transformer and you have 75 amps of coil current, this coil current refers to the current flowing through the windings of the transformer.

In a balanced three-phase system, the current in each line conductor (the circuit conductors leading from the transformer to the load) will be equal to the phase current if the load is connected in a wye configuration, which is the case here. Thus, the current flowing in each circuit conductor to the load will also be 75 amps.

Each phase of the transformer supplies its respective portion of the total current to the load, and since it is assumed that the load is balanced, the same amount of current flows through each line conductor. Therefore, the answer of 75 amps is correct for each conductor supplying the load from the transformer.