So how would you run an instant water heater or electric induction stove then? Every apartment and house I've ever lived in had 380V three-phase right to the kitchen, to the bathroom, and to basement rooms (e.g. for prosumer workshop tools).

> So how would you run an instant water heater or electric induction stove then? Every apartment and house I've ever lived in had 380V three-phase right to the kitchen,

I run an induction stove on 220V single phase every day here in the US.

Isn't it two phase? AFAIK in the US you have 240V two phase with 180° between them.

The US uses a single, split phase

https://en.wikipedia.org/wiki/Split-phase_electric_power

I wired one phase to all the burners and the oven. They're on a separate circuit with a 16 amp fuse. It's 2200W. Has mever tripped. 400V is just not very common for residential in the EU, maybe in the UK you have electric boilers and other powerful appliances. I had a good laugh when I saw that your codes require an electrical connection between the two taps. Makes total sense from a safety perspective but it's still funny.