Neutral, Yes, Again...

[engy]

I hate to do this, but I don’t recall what I have found has been discussed before.

I was in the 2002 NEC index and noticed an entry for Neutral.
Fine, I know they use the word…

Immediately following says “see also Conductors, grounded”
Does this imply a neutral and a grounded conductor are the same?
Not really, but interesting...

Lets look at the first two entries…(wasn’t up to looking at all of them)
Bare, 230.22 Ex., and 230.30 Ex.
Neither reference mentions neutral, they mention grounded conductor.
Further proof that a neutral and a grounded conductor are the same?

Now what really caught my eye…
DEFINITION! Art. 100-I
Couldn’t seem to find it though…
Is this an error, or an episode of the twilight zone?

I traced this back to the ‘96 code, the oldest at my desk.
Not sure how far this reference to a neutral definition goes back.
Tonight I will make some whiskey-cokes, and see how far I get…

 

[dereckbc]

Re: Neutral, Yes, Again...

The neutral is "grounded circuit conductor".

 

[russ]

Re: Neutral, Yes, Again...

This is off my Chicago cd, but it should be the same as NEC.

Branch Circuit, Multiwire.
A branch circuit consisting of two or more ungrounded conductors that have a potential difference between them, and a grounded conductor that has equal potential difference between it and each ungrounded conductor of the circuit
and that is connected to the neutral or grounded conductor of the system.
200.2. General.
All premises wiring systems, other than circuits and systems exempted or prohibited by Sections 110.10, 215.7, 250.21, 250.22,
250.162, 503.13, 517.63, 668.11, 668.21, and Section 690.41, Exception, shall have a grounded conductor that is identified in accordance with Section 200.6. The grounded conductor, where insulated, shall have insulation that is:
(1) Suitable, other than color, for any ungrounded conductor of the same circuit on circuits of less than 1000 volts or impedance grounded neutral systems of 1 kV and over; or
(2) Rated not less than 600 volts for solidly grounded neutral systems of 1 kV and over as described in Section 250.184(a).

[ December 26, 2003, 05:26 PM: Message edited by: russ ]

 

[websparky]

Re: Neutral, Yes, Again...

Hi Guys,

How about this definition?

Neutral Conductor - A current carrying system or circuit conductor that is intentionally grounded.

 

[jxofaltrds]

Re: Neutral, Yes, Again...

Neutral. Def. What the posters on this site are not.

BTW has our host ever given a definition of this?

Mike P.

[ December 26, 2003, 06:26 PM: Message edited by: jxofaltrds ]

 

[roger]

Re: Neutral, Yes, Again...

"Whiskey-Coke" a "caramel colored, carbonated, sugar flavored water," inhanced alcoholic drink, wait, that isn't the confussion. Nevermind

Roger

 

[ryan_618]

Re: Neutral, Yes, Again...

Originally posted by roger:
"Whiskey-Coke" a "caramel colored, carbonated, sugar flavored water," inhanced alcoholic drink, wait, that isn't the confussion. Nevermind

Roger

mmm...whiskey-coke

 

[greensky]

Re: Neutral, Yes, Again...

Neutral conductor is a conductor intentionally put to ground but it carry current.Example of this to be defenite is the 3 phase Y connected transformer (let say secondary winding voltage is 220/110V 3 phase)3 line conductor have a potential of 220V while the neutral conductor have 110V ( I am talking phase to phase voltage).Therefore a neutral line is a current carrying conductor.
As for ground conductor, there are two types of ground conductor, one is non-current carrying and the other is current carrying conductor.
None current carrying conductor is used in motor casing/panel/controller casing in other words this wire serve as a continous connection between any metal part to the grounding rod/plate.
As for current carrying it is similar to the transformer connection where the neutral can serve as ground conductor as well like my example above.

but for high potential transformer where part of the winding is being grounded this is called ground conductor.

Typical example of this is in asian countries where wood pole is used, you will noticed that every transformer is being grounded.

In some transformer making you will notice this: connection abcn(delta with n) or abcnY n denote for neutral.

 

[biga26]

Re: Neutral, Yes, Again...

A "neutral" carries the unbalanced current of 2 or more loads (single-phase 3 wire or three-phase
4 wire circuits).

In a 2 wire 120 volt circuit, the grounded conductor (white) carries the same current as the ungrounded (hot) conductor.

 

[engy]

Re: Neutral, Yes, Again...

Interesting replies...

My actual point was, I found it interesting that in the index, there is a reference to a definition of "neutral" in Art. 100, which of course we all know there is not. (YET)

 

[brian john]

Re: Neutral, Yes, Again...

As for ground conductor, there are two types of ground conductor, one is non-current carrying and the other is current carrying conductor.

Very broad statement that has a lot of HOLES.
So Roger pass me that whiskey and Coke.

[ December 29, 2003, 10:16 AM: Message edited by: brian john ]