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#103795 11/26/02 06:31 PM
Joined: Oct 2000
Posts: 2,749
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[Linked Image]

Sent In From the Field for ECN Review

Quote
Here's a photo of a panelboard at our company. It's a non-powered mock-up of
how our wiring solution would be terminated at the panelboard. The application
is for a large PC installation, such as in an office. Thus, the potential for
harmonics, unbalanced loads, and the reason for the multiple neutrals.


Joe Tedesco, NEC Consultant
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Joined: Feb 2002
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This is an easy one.

Multiple grounded conductors under one terminal are no longer permitted. With all the unused terminals on the bar, this is easy to fix.

This is a subpanel, therefore, grounding conductors cannot be mixed with grounded conductors. This is also easy to fix, simply install a ground bar and remove the grounds from the neutral bar.

Otherwise, this "installation" is very neat.

Sorry, I can't cite code references since I don't have the '02 book. I'm sure other members can.


Peter
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Peter
Joined: Oct 2000
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stripped noodles...ooooh

Joined: Feb 2002
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Depending on the load, you may want a tie on each set of 3 breakers (such as when you are feeding a bunch of modular furniture)

Joined: Nov 2000
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<devil's advocate>
Since when is anything but white or grey allowed for grounded conductors? The NEC specifies green or yellow with a green stripe for equipment grounding conductors, but no provisions are given for duel colored conductors being allowed for the grounded conductor.
</devil's advocate>

Is this allowed?

(I realize that this is the new Romex with 2 noodles, but is it legal?)

[Linked Image]


-Virgil
Residential/Commercial Inspector
5 Star Inspections
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Joined: Apr 2002
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Hey 66:
What "romex" you talking about???????

BTW, we have used "striped" neutrals....
Had a electronics mfg plant that had some stringent and strange specs....
White w/red, pink, yellow, black, orange...
Green w/ (matching the above)

The above was installed to feed electronics racks from a "clean" sub-panel...
Besides the strange colors, everything was numbered....
Wsa a real good client until they went "belly-up"
John


John
Joined: Apr 2002
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Wow, got of the subject there, sorry...
Your panel is a neat job, but it gets a red sticker.
Grd & neutrals on same bar; bonding neutral at sub-panel; multiple conductors terminated at neutral bar;
I'm assuming this is a conduit job, as I believe the only "striped" white wre available is MTW/THW or THHN.
Have you used or thought about AFC's "Super Neutral" MC cable...great for office partitions....
John


John
Joined: Feb 2002
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HotLine,

There's a new Romex product from Southwire designed for 2 cicuits.
http://www.southwire.com/news/050702.htm

I believe striped neutrals are also standard fare with the new multiple-neutral MC cable.
http://www.afcweb.com/pdfs/01catalog/01cat-p17-hr.pdf


Peter
Joined: Nov 2000
Posts: 2,148
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I don't see any provision in Article 200 that permits the use of colored stripes on the white wires for grounded conductors, except for the identification of grounded conductors of different systems. I don't see any problem using them except that it is not in complete compliance with the NEC. I would expect that Southwire has submitted proposals to change this in the 2005 code.
don


Don(resqcapt19)
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