We're really conflating apples and oranges here as the voltage is only half the equation; By code, US 2 phase (120x2 == 240) is going to be wired with lower ga

We're really conflating apples and oranges here as the voltage is only half the equation; By code, US 2 phase (120x2 == 240) is going to be wired with lower gauge wire to provide more overall electricity. Typically, the 240v is going to be capable of providing 600 total amps (though there are cases where 400amp is served); with a typical breaker at 30 or 40 amps. compared to a triple 415 providing 8 or 15amps.