Re: [CAD_CAM_EDM_DRO] Interesting, 3 phase in the UK

John wrote:

> This has become a level more complex. I called Manweb again to ask about the
> line voltage to be told that the minimum supply they would fit would be a
> 44kVA one and that I'd need to buy the meter and pay £600 - 1000 to have my
> current line removed and the three phase one put in. This really made me
> wonder after I was told it would be totally free. So I began thinking, lets
> try the best out of three. So I called again and spoke to someone else who
> again told me the upgrade would be totally free so long as I already had a
> meter in place. They said, I quote "The upgrade fee is if your house is
> totally unconnected, otherwise it's free!".

44 kVA? Yikes, that's a lot of power. Is that a 100 A service? Or is it
173 A per phase?

>
> I don't have three phase running into my house but according to these guys
> so long as I have a single phase they'll make it three phase for nout. I get
> the feeling they mean they'll cut off my single and use the current cable
> for the three.

Oh, I don't think you want a delta 440 V service, but I gather that UK single-phase
service is floating, anyway, so maybe it doesn't matter. But, if they put in a
440 V delta system, you are going to have to come up with some gear, a pad-mount
transformer, at least, to get your residental 220 supply. A 440 V L-L service
would give 254 V L-N, but that is only if a Wye service is installed. That would
probably need 5 wires from the pole, at least in the US.

Jon