In article ,
Thomas Tornblom writes:
Residential power in Sweden is 400V 3 phase, main fuses normally 25A
or lower.

Room outlets are wired with one phase, neutral and ground to get 230V.

There is a smallish transformer station in the neighborhood which
probably powers two entire blocks. I would guess somewhere around 20-30
houses.

Similar in UK.

In most European countries, there's a single phase current limit,
above which you have to take a 3-phase supply. In the UK, that's
100A, so it's not very common to have a 3-phase supply although
you can ask for one if you want a 3-phase supply. In some other
European countries, the single phase limit is as low as 20A, so
just about everyone has a 3-phase supply.

Residential substation transformers (11kV down to 230/400) are
usually 1MVA, feeding a number of streets. A substation may have
more than one transformer in some cases (although they usually
only start out with one). Obviously, smaller transformers are
used where there aren't so many houses, and these are sometimes
pole mounted if the wiring is overhead.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]