600 Volt Outlet - was "General Discussion: On-TopicandOff-Topic Posts"

From: Dan Cohoe <dancohoe_at_oxford.net>
Date: Sat Feb 7 08:30:16 2004

> -----Original Message-----
> From: cctalk-bounces_at_classiccmp.org
> [mailto:cctalk-bounces_at_classiccmp.org]On Behalf Of ed sharpe
> Sent: Saturday, February 07, 2004 12:30 AM
> To: General Discussion: On-Topic and Off-Topic Posts
> Subject: Re: 600 Volt Outlet - was "General Discussion:
> On-TopicandOff-Topic Posts"
>
>
> Yes I know the wiring is rated at 600 but I have not seen
> any semi modern
> gear that required it....
>
> ed!
> ----- Original Message -----
> From: <order_at_saracom.com>
> To: <cctalk_at_classiccmp.org>
> Sent: Friday, February 06, 2004 11:51 AM
> Subject: Re: 600 Volt Outlet - was "General Discussion: On-Topic
> andOff-Topic Posts"
>
>
> > > Message: 21
> > > Date: Fri, 6 Feb 2004 01:16:24 -0700
> > > From: "ed sharpe" <esharpe_at_uswest.net>
> > > Subject: Re: Greedy E-bay idiots!
> > > To: "General Discussion: On-Topic and Off-Topic Posts"
> > > <cctalk_at_classiccmp.org>
> > > Message-ID:
> > > <002601c3ec89$82ca0c20$25696e44_at_SONYDIGITALED>
> > > Content-Type: text/plain; charset="iso-8859-1"
> > >
> > > now what the hell is a 600 volt outlet?
> > >
> > > 110 220 440 maybe but 600 volt? hmm.....
> > >
> > >
> >
> > I use it all the time but in a non-standard
> > application. I do AC power fault simulation on
> > Telco equipment. Since the tranformers are standard
> > off the shelf units, I thought I would ask an engineer
> > friend.
> >
> > Industrial induction motors use 1000 volt feed from a
> > delt transformer. It comes out 1000 line to line or
> > 577 line to ground. 577 is effectively 600. Most
> > of your wiring and other devices are rated at 600vac.
> >
> > Max
> >
> >
>
The standard medium power AC supply in industrial use in Canada is 575 volts
(nominally 600). This provides a nominal 347v from a Y branch to ground.
There is almost no 440 volt 3 phase service used here. For low voltage 3
phase service we generally have 208v 3ph which provides 120v single phase
to ground from any single leg of the Y.

The 575 volt service is generally called "600 volt supply" and I expect this
is what the S/390 that started this discussion should be connected to.

As someone else mentioned, this is quite "hot". Its a bad idea to attempt to
plug a wet Hubbell plug into a live receptacle operating with the 600v
service or for that matter to fool around with any tools in the vicinity of
live parts. Once a flash-over starts, you've got some real fireworks.

Recently I've been recovering some equipment from a deceased scrapper's farm
and have had to carry various treasures around a large obstacle with a
protruding shaft. I checked the plate and found its a 6000 hp electric
motor..requiring 13,200 volt supply. I guess you'd need to be careful
working on this one!

Dan
Received on Sat Feb 07 2004 - 08:30:16 GMT