Why the neutral in USA wiring?

[John G]

"Barry Jones" <bjones01@acm.org> wrote in message
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Rheilly Phoull wrote:

"Barry Jones" <bjones01@acm.org> wrote in message
news:424f15dc$0$5727$8f2e0ebb@news.shared-secrets.com...

The ground (green wire) makes sure the hardware/enclosures the
current
carrying circuits are housed in are grounded for safety reasons. . .

Also the MEN system helps out adjoining premises if they have a high
resistance earth and seems a good way to have a complete earth 'mat'.

That's an Australian term, right? Multiple Earthed Neutral? How is
that implemented?

I've seen earth potentials range over a few volts within a few tens of
meters. What does that do to the neutral line?
--
Barry
****

From what I have been able to sift from the crap posted everytime this

or similar questions come up....

The Australian MEN system is about the same as the US system as far as
Grounds ar concerned.

The neutral which of course is the centre of a WYE circuit 230/400 volts
is tied to a ground stake at various points of the system. There is a
pole transformer outside my house and the neutral is securely grounded
there.
Then the Neutral and a houshold ground stake are tied together in the
building distribution/entry box. After that there is a neutral and a
ground (and a hot of course) to every General Purpose Outlet thru the
appropriate breakers of generally 16 amps. Although I have 3 phase at
the box only one phase is used in the house, the 3 phase is just for the
air con. Most houses would only have 1 phase at GPOs so you could not
get 400 volts by using 2 outlets like I have heard of being done in USA
to get 220volts.
There are no fuses in plugs as there are in the UK and many new small
appliances are double insulated and do not have a ground connection a
all.
The ground was NEVER used in this country, as a current carrying
conductor, like it was in Edison USA.
--
John G

Wot's Your Real Problem?

 

[Rheilly Phoull]

"Barry Jones" <bjones01@acm.org> wrote in message
news:424f74c6$0$5532$8f2e0ebb@news.shared-secrets.com...

Rheilly Phoull wrote:

"Barry Jones" <bjones01@acm.org> wrote in message
news:424f15dc$0$5727$8f2e0ebb@news.shared-secrets.com...


jsmith wrote:



For crissakes don't any of you realize that the neutral is the return


path


for the current and completes the circuit!!
The ground (green wire) makes sure the hardware/enclosures the current
carrying circuits are housed in are grounded for safety reasons. . .


.DUH!!





Fer crissakes, I thought that's exactly what I said. And I described the
system for those not familiar with US wiring.

And fer crissakes, learn to bottom post.

--
Barry



Also the MEN system helps out adjoining premises if they have a high
resistance earth and seems a good way to have a complete earth 'mat'.


That's an Australian term, right? Multiple Earthed Neutral? How is that
implemented?

I've seen earth potentials range over a few volts within a few tens of
meters. What does that do to the neutral line?
--
Barry
****

**

Since as stated by John, every household is supposed to have the neutral
link bonded directly to the earth stake (or waterpipe if metallic).
Since the advent of plastic water piping being used the stake would probably
be the norm now I guess.
The resistance of the stake to ground is tested and must conform to
standards.
So with most of the neutral lines being earthed all the way along the
streets by the household stakes in addition to the various bonding of the
reticulation system it makes for a good stable neutral line should an
individual earth be faulty.

--
Regards ..... Rheilly Phoull