[Dylan16807]

I'm not talking about the safety of different ways of doing three phase. I'm taking it as a given that three phase is wye ground and optimal for safety.

My point is that in the context of a 230V single phase circuit, your ground is no longer in the middle. The ground is on one end of your single phase. If you want a safer single phase, you need to rebalance it to +115 and -115.

[jcalvinowens]

I thought they meant a "two phase" service where the two phases are 120 degrees out of phase instead of 180, like an apartment fed with two poles of a 208V wye with 120V to neutral/ground, which is balanced. If it's just a single phase, you're right.

[Dylan16807]

EU power is ~230V on a single phase and ~400V between phases. So a house usually gets three phases, but the only appliance where the voltage to ground is less than the total voltage is probably the oven.