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

Alan and the list
about 12 years ago when I builded my garage/ workshop I put on a 3ph power ,as
I did not want the local council to complain I told the electricity company that
I wanted the 3ph power to run a 8hp air conditioner , and they told me that I will
have to pay AUS$80. per phase and if I hook up an air conditioner of more than 5 hp within one year they will give the money back
,they put me 3 ph with
a 100 amp fuses. I did not put the air conditioner for another 5 years ,and worked
all the time with my machines for that time, I did not get the money back from them
but the extra phases paid for themselves
regards and Happy new year
mariano


JanRwl@... wrote:

> In a message dated 01-Jan-01 05:34:16 Central Standard Time,
> chris@... writes:
>
> > 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,
> >
>
> Chris: Surely some reading this will scream and holler, and disagree with
> other untoward forms of protest, but know this: Here in the U.S., there are
> regions where the "local government" details are draconian and 19th-Centurish
> (see Bahstan, MA, etc.); but here in good ol' Texas (where the buffalo and
> cowboys roam), in some "city areas" where there are "zoning restrictions",
> you might have to watch your behavior, and it is possible that some
> bureacrat-inspector who have moved down here from a "north-eastern State,
> with a chip on his shoulder" would make trouble, even for a clean and silent
> home-shop with only tiny "hobby machines", used on Saturdays between 11:00
> and 16:00. But some of us have the fortune to live in Houston, or perhaps
> better-yet, "outside the city-limits", where there are no such silly rules
> (well, OK, maybe "deed restrictions" in hotsy-totsy "rich-boy
> neighborhoods!), and a person can quietly do his machine-building, and export
> to countries across the sea (Have! And will, any time someone wants summin!)
> with NO problem! Three phase? Here, three phases "run around" near some
> residential areas, but usually only along "main thoroughfares", and only
> single phases "down the easements", behind rows of houses. I was lucky in
> moving here, as my home-shop is back-to-back with a private school with
> three-phase (they have tons of air-conditioning, a necessity, here!) so, I
> only had to pay the utility to increase the size of the "pole pots" (that's
> utility-personnel lingo for "transformers up the power-pole") so they could
> handle the school and my 5KVA "worst-case load", and they did that in an
> afternoon, and I have had "real" three-phase ever since. I have heard,
> since, that the local power-company will not do this, any longer (supply
> 3-phase to a residence), even for money! But I have no confirmation, nor
> real reason to believe it.
>
> As someone in a musical once said, "It is a pondrement!"
>
> Oh, no, the "stringing" of only 110 V. to houses, while perhaps occasionally
> done 50 years back in rural areas, is not now done. Houses, even those with
> only lights and an electric fan or so, are supplied with "center-tapped" 240
> VAC, that center-tap being "neutral", also usually "grounded" ("earthed" in
> English English). Then, "either side" is 120 VAC, for lighting, etc.
> Kitchen stoves and most single-phase air-conditioning macines are 240 VAC
> single-phase. 110 V. is no longer "nominal" in the USA, but 120 V. is. It
> actually varies from 95 to 130, depending upon the season, phases of the
> moon, how far one is "from the pole", how tight (the installer was when he
> didn't tighten) the connectors, etc. I have a "line meter" in my office,
> here, and that varies from 108 to 125 VAC, depending upon the season and
> whether the AC is running, or at rest. It is nearly amusing to think about
> it!
>
> [Non-text portions of this message have been removed]
>
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