[TechAssist] Re: 220v
- From: Gene Bartle <hemi426_56443@xxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 20 Dec 2002 09:38:54 -0800 (PST)
Hello all,
The 3rd wire in american residential systems (non
3-phase) is the nuetral wire. It is a current carrying
conductor but is also at ground potential. That is why
our system is considered to be more dangerous -
because it is referenced to ground, but the neutral
is NOT a ground wire, and the ground wire is NOT to
carry current (except in emergencies). To get a shock,
we need only to be touching some kind of grounded
surface (commonly available) and one live wire.
To the best of my knowledge, the 220 volt systems in
other countries are not referenced to ground potential
and would be similar to us techs using our isolation
transformers - you would need to make contact with
both live conductors to get a shock.
Gene Bartle
(hemi426_56443)
Tom,s TV (tomstv.com)
25 NE Washington St
Brainerd, MN 56401
--- Chris Gorsch <cgorsch@xxxxxxx> wrote:
>
> Hi Damon, this differs with Power suppliers, I live
> in the suburbs of
> Central Louisiana and we"re supplied by a Rural
> Electric Co. They deliver 3
> wire 220 to homes, The 3rd wire is a large
> unshielded wire. Most Main fuse
> boxes use both sides to gnd
> to balance the load. If 220 is needed then it is
> delivered from both sides
> and there is a neutral (gnd) also used. the
> receptacles have different
> forms depending on how much current is demanded. My
> neighbor had a large
> workshop where he welded among other things and he
> had a special line run to
> supply him with 3 phase current for large motors,
> etc. Hope this clears some
> of the confusion about USA power, European is
> different depending on which
> country U visit. Wal-Mart supplies a travel kit with
> adaptors for all
> counties U might visit.
> Ski
> BLESS AMERICA, PLEASE GOD!
> SKI-CHRIS GORSCH Retired Chris'TV/VCR Serv.
> ZACHARY, LA.
> cgorsch@xxxxxxx If Replying, Please Include Copy of
> Message
> ==========================================
> "Whatever it is the government does, sensible
> Americans would prefer that
> the government do it to somebody else."-- PJ Orourke
> ----- Original Message -----
> From: "Damon" <DAMON101@xxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, December 20, 2002 5:52 AM
> Subject: [TechAssist] Re: 220v
>
>
> >
> > This really doesn't make economical sense,
> tri-phase systems in
> residential
> > areas??
> >
> > REALITY: 2 wires provide power, the only
> difference is the transformer
> setup
> > that drops down the power to your home. In the
> land of 110 our transformer
> > outputs 220V with a center tap that delivers 2 -
> 110V supplies or 1 - 220V
> > supply. (Hey, isn't that sweet....3 supplies in
> one, eh?).
> >
> > As for the european 220V supply system......I can
> only guess, but you do
> not
> > have that Center-tap. And I really doubt that the
> electric company is
> going
> > to use 2 wires for power, then strap on a 3rd wire
> for grounding purposes
> > (what purpose would that serve, except to
> reference the metal toaster
> casing
> > to your bathtub water??). I'm sure the 220V
> tranformers have no practical
> > need for earth ground, since all the electronics
> would behave as though
> they
> > had an "Isolation transformer" on them. (That's
> the stepdown
> > transformer...outside your home).
> >
> > Personally, I've heard that 110V is more dangerous
> than 220V......but I
> > don't see that as a logical
> argument...What.....110 has less voltage,
> > therefore we enjoy holding onto it longer, thus
> toasting us, but not the
> > europeans????
> > If anybody has an answer to why 220 is safer than
> 110.... I'm listening.
> >
> > And that TRI-PHASE residential power supply???
> Man, that is a load of
> > hooey....of course, the government planners
> weren't reaching into their
> > pockets, so I can assume they tapped into your
> dad's or grandad's
> wallet??
> >
> > Damon Brunger
> > damon101@xxxxxxxxxxxxxx
> > Telrad Electronic Services
> > Ft Wayne, IN 46815
> > ----- Original Message -----
> > From: "Vilhelm Boor" <villyboor@xxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>;
> <techassist@xxxxxxxxxxxxx>;
> > <techassist@xxxxxxxxxxxxx>
> > Sent: Friday, December 20, 2002 8:29 AM
> > Subject: [TechAssist] Re: 220v
> >
> >
> > >
> > > Villy Boor
> > > Boorelec Durban
> > > I have to come back with a post script, To get
> voltage for a TV at
> over
> > 200V would require you to use a transformer. I am
> sure there could be
> other
> > methods using odd switching type devices but
> extremes of design like that
> > would be nonsense as it would be cheaper to get
> the correct model. I can
> not
> > see where the smoke would be derived if you stuck
> this on your TV as I am
> at
> > a loss as to how you would hook it up.
> > > On Fri, 20 Dec 2002 07:59:10
> > >
> > > --
> > >
> > > On Fri, 20 Dec 2002 07:59:10
> > > Vilhelm Boor wrote:
> > > >
> > > >Villy Boor
> > > > Boorelec Durban
> > > > I am shocked that I know more about your
> power supplies in North
> > America than seemingly you its residents do. North
> America works on 110V
> and
> > you are stuck with that, tough its not as safe and
> losses are greater. Now
> > you have a situation where you wish more voltage,
> you have to cheat The
> > mains supply is 3 phase, it is usual to run a line
> down a street and try
> to
> > balance the power by having house 1 on phase 1
> house 2 on phase 2 etc. To
> > get 220V you have to cheat, you use 2 phases so a
> plug has 2 live's. But
> why
> > in the name of Freddy would we have to do that.
> Options on the back of TVs
> > have gone, that requires you have a mains
> transformer, costs money is a no
> > no. American TV is only viewable in America and a
> few other countries, the
> > rest of us use the PAL system a much later and
> superior system, it follows
> > then there is no requirement for your sets to work
> here or X. No we have
> > standard 3 pin plugs (flat Pins pointing at 10 and
> 2 with an unused earth
> at
> > 6) nominal fuse volt
> > > a
> > >
> > > > ge
> > > > is 4A and there is no mystery
> > > >--
> > > >
> > > >On Thu, 19 Dec 2002 21:54:26
> > > > Julian Panizo wrote:
> > > >>
> > > >>In the countries with 220-240 V many sets have
> the 110 V option via
> > switch
> > > >>and a few have the voltage change automatic.
> The household wiring is
> two
> > (2)
> > > >>conductors, normally one hot and the other
> neutral, derived from a
> > street
> > > >>trifasic supply. In a few countries you get in
> some places 220 and
> > others
> > > >>110.
> > > >>Julian
> > > >>
> > > >>Julian Panizo
> > > >>C.C. 1867 Asunción Paraguay
> > > >>Phone/Fax 595 21 601913
> > > >>panizo@xxxxxxxxxxxxxxx
> > > >>----- Original Message -----
> > > >>From: "Electric Medic"
> <info@xxxxxxxxxxxxxxxxx>
> > > >>To: <techassist@xxxxxxxxxxxxx>
> > > >>Sent: Thursday, December 19, 2002 8:41 PM
> > > >>Subject: [TechAssist] Re: 220v
> > > >>
>
=== message truncated ===
__________________________________________________
Do you Yahoo!?
Yahoo! Mail Plus - Powerful. Affordable. Sign up now.
http://mailplus.yahoo.com
------------------------------------------
Submit A Repair Tip For Everyone Here:
http://www.tech-assist.org/secure/tip/main.html
------------------------------------------
To REMOVE your email address, click here:
http://www.tech-assist.org/unsubb.html
To CHANGE your email address, click here:
http://www.techassist.net/forms/change.html
Other related posts:
