[grundrausch3n]

Technically basically all buildings in Germany (residential and commercial) run on 400V 3 phase power. But access to it via sockets is only common in residential homes via sockets in a garage. It gets more common with car charging although they rather use 3 x 230V as far as I am aware of.

[viernullvier]

Fun fact: 400V 3-phase and 3x 230V are the very same thing. You'll get 230V AC between Neutral and each of the three phases, but the AC voltage between two of the phases will actually be 400V.

[ponector]

I'm living in apartment block built in 2016 in eastern EU and here every apartment has a separate 3 phase(5 pin) socket for the stove. It is a 7kw beast, it can easily destroy regular aluminum-steel pan if you put it on max heat. Steel part will fall apart.

[eru]

Same in Eastern Germany, at least up to the 2000s. (Probably still, but I left, so can't vouch.)

[eru]

I seem to remember our electrical stove and oven back in Germany in the 2000s using three-phase power.

Here in Singapore I think our pool pump uses three phase power, too. (Our plugs and outlets here in Singapore follow the British model.)