David Wright <deb...@lionunicorn.co.uk> wrote: > I was under the impression that 3-phase to a private residence > contravenes building regulations, as that would make 440V available > for you to electrocute yourself.
No, it's perfectly possible - just look at your local DNO's website. It's necessary when there's a large power draw. Historically when people have had a workshop with three phase machines or just a very large house, and increasingly for 3-phase EV chargers and heat pumps (again for large, poorly insulated houses :) It's common in some places on the Continent because they have much lower current limits per phase. 3-phase 32A for example. It's pretty easy to electrocute yourself with 240V, no need for 440V :)
