Re: [CAD_CAM_EDM_DRO] 3-Phase motor running from Single Phase Supply ?

Chris,

On the west coast, at least, we have "two-phase", I.E., a grounded
centertap 220v transformer on the "pole" (or in the transformer pit).
So we get two 117v "mains". And no, I don't want to re-start the
2-phase vs. NOT 2-phase thread again! My hot tub pump motors run on
220v, and the natural gas water heater I mentioned earlier. 100A or
200A (approximately) services are common. 3-phase service would be
impossible to get here (CC&R's). Housing development is about 10 years
old on central coast California. My "good neighbors" surely would have
a fit if I had any "real machines"! :>(

Alan KM6VV


Chris Hellyar wrote:

>
> > In the US, 3 phase power is generally only available to industrial
> > areas. If you wanted it in a residence, you would have to pay the entire
>
> Cor, What do you do if you want to heat and light a large house? Run a
> massive single phase feed? with only 110V to go on, you'd get some pretty
> high current feeds to larger homes I imagine!
>
> Come to think of it, how do you run a decent spa pool? When the Spa is on
> full noise with both pumps going it pulls 7A per phase, which is 5kW or
> there abouts. With 110V single phase you'd need to pull 45A from the single
> phase? That's a heavy feeder wire to the house....
>
> Here in NZ, it is common, although not universally standard, to have 3 phase
> everywhere, all of the street mains is 3 phase, and every third house gets
> the same phase.
>
> >All that said, I know of lots of machine shops in houses (mostly small
> >commercial job shops ;) ). They "get away with it" by keeping a low
>
> We have zoning restrictions etc here as well, although not as draconian
> sounding as yours... The "home business" scenario is pretty much open
> slather unless you have excessive traffic, noise or discharge (light, sound,
> vibration, smoke, any type). Our government virtually encourages small
> "Cottage" businesses.
>
> Cheers, Chris.
>
> - Living not in the land of the free, but I can use a 3 phase angle grinder
> at 2am, and my neighbours don't care... :-).
>