From: "Michael A. Terrell"
Subject: Re: American vs foreign electrical parts and installations
Date: Wed, 18 Sep 2002 14:14:52 -0400
Organization: I'm trying!
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Andrew Gabriel wrote:
> In article ,
> Daniel Haude writes:
> > In Germany (don't know about the rest of Europe) there's no house that
> > DOESN't have 400V 3p at least into the basement and often into the
> > individual flats.
> I don't know about Germany specifically, but in a number of
> EU countries, there is a single phase limit, above which you
> will need to switch to 3-phase supply. In the UK, this is 100A,
> so if you need more than 100A service, you will normally have
> to go 3-phase, but this is not common as 100A is normally
> enough. In some other EU countries, this is as low as 25A,
> in which case most houses will have 3-phase.
> In pretty much all of Europe, 3-phase is run in the street
> (except for sparse rural areas), so it isn't difficult to
> supply. What I notice in the US is that you don't normally
> get more than 1 phase run in a street (another in a different
> street, etc), which would make 3-phase supply to a house much
> harder (not to mention that the US can't do neighbourhood
> distribution at 120V anyway so poles are dotted with tin can
> transformers, whereas neighbourhood distribution at the direct
> 230/400V mains is the norm in the EU).
> Andrew Gabriel
You have the advantage of lower voltage drops by using a single
transformer (AKA: Pole Pig) for a small group of homes. If one fails it
only affects the houses on a single transformer. Some homes do have
three phase run past them. It depends on when the local distribution
system was built, or last upgraded. Since you can buy almost any piece
of equipment you need for 120 or 240 volt operation.
Industrial equipment usually would not be used in a residence, unless
it is very quiet, and the operation doesn't require a permit from the
An old fart since August 5th, 2002!
Michael A. Terrell
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