7 Oct
2005
7 Oct
'05
11:30 a.m.
On Fri, 07 Oct 2005 19:57:14 +0200, Ethan Dicks <ethan.dicks at gmail.com>
wrote:
On 10/7/05, Chuck Guzis <cclist at sydex.com>
wrote:
200A @ 110V makes for 22kVA per phase - what do you need all that power
for?
I use electrical heating (in southern Norwegian climate), and rarely need
more than 7kW.
Looks like it will be cost effective again this winter, so I have not
filled the oil tank...
One special feature of Norwegian wiring is that we do not have any concept
of "neutral", since the distribution transformers are delta-connected.
Both phase wires are supposed to have the same potential to earth. This
makes the shock hazard from 230V not much higher than from 110V, since
most shocks are between a wire and earth. On the other hand, it does not
always work well with equipment built on the premise that there is a
neutral wire.
Anybody else living in a place that does not use Y-connected transformers?
--
-bv
What is the common residential distribution in
the UK? In the US, most
residences seem to be wired with 230v 200 amp service, although some of
the newer houses in my neighborhood are getting 400 amp panels.
In my area (older part of Columbus, OH, with houses built between
about 1910 and 1935), we have lots of the old 60 Amp drops with 3
parallel light gauge wires, and lots of the modern 200 Amp
2-insulated-plus-one-uninsulated bundles. I haven't seen any 400 Amp
drops, but I suppose I wouldn't be able to distinguish them from 200
Amp drops by sight.