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#103795 - 11/26/02 02:31 PM It's a non-powered mock-up
Joe Tedesco Offline
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Registered: 10/07/00
Posts: 2749
Loc: Boston, Massachusetts USA


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.
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#103796 - 11/26/02 03:38 PM Re: It's a non-powered mock-up
CTwireman Offline
Member
Registered: 02/07/02
Posts: 840
Loc: Connecticut, USA
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.
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#103797 - 11/26/02 03:57 PM Re: It's a non-powered mock-up
CTwireman Offline
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Registered: 02/07/02
Posts: 840
Loc: Connecticut, USA
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#103798 - 11/26/02 05:02 PM Re: It's a non-powered mock-up
sparky Offline
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Registered: 10/18/00
Posts: 5303
stripped noodles...ooooh
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#103799 - 11/26/02 05:14 PM Re: It's a non-powered mock-up
n1ist Offline
Member
Registered: 02/13/02
Posts: 183
Loc: Malden MA
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)
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#103800 - 11/26/02 05:18 PM Re: It's a non-powered mock-up
sparky66wv Offline
Member
Registered: 11/17/00
Posts: 2232
Loc: West Virginia
<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?)

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#103801 - 11/26/02 05:49 PM Re: It's a non-powered mock-up
HotLine1 Offline


Member
Registered: 04/03/02
Posts: 6776
Loc: Brick, NJ USA
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
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#103802 - 11/26/02 05:54 PM Re: It's a non-powered mock-up
HotLine1 Offline


Member
Registered: 04/03/02
Posts: 6776
Loc: Brick, NJ USA
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
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#103803 - 11/26/02 05:56 PM Re: It's a non-powered mock-up
CTwireman Offline
Member
Registered: 02/07/02
Posts: 840
Loc: Connecticut, USA
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
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Peter
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#103804 - 11/26/02 06:06 PM Re: It's a non-powered mock-up
resqcapt19 Offline
Member
Registered: 11/10/00
Posts: 2148
Loc: IL
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
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