[phs2501]

Pretty sure residential 3-phase in Europe is 400V phase-to-phase, it's 220V phase-to-neutral.

[dotancohen]

It's 220/240 volt RMS to neutral, which is about 312 volt maximum to neutral at the top of the phase.

[qayxc]

make that 230V (min.) or rather 240V (nominal).

[ajsnigrutin]

230V nominal in EU