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#103795 - 11/26/02 06:31 PM It's a non-powered mock-up  
Joe Tedesco  Offline
Member
Joined: Oct 2000
Posts: 2,749
Boston, Massachusetts USA
[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

2017 / 2014 NEC & Related Books and Study Guides

#103796 - 11/26/02 07:38 PM Re: It's a non-powered mock-up  
CTwireman  Offline
Member
Joined: Feb 2002
Posts: 840
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.


Peter

#103797 - 11/26/02 07:57 PM Re: It's a non-powered mock-up  
CTwireman  Offline
Member
Joined: Feb 2002
Posts: 840
Connecticut, USA


Peter

#103798 - 11/26/02 09:02 PM Re: It's a non-powered mock-up  
sparky  Offline
Member
Joined: Oct 2000
Posts: 5,303
stripped noodles...ooooh


#103799 - 11/26/02 09:14 PM Re: It's a non-powered mock-up  
n1ist  Offline
Member
Joined: Feb 2002
Posts: 183
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)


#103800 - 11/26/02 09:18 PM Re: It's a non-powered mock-up  
sparky66wv  Offline
Member
Joined: Nov 2000
Posts: 2,236
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?)

[Linked Image]


-Virgil
Residential/Commercial Inspector
5 Star Inspections
Member IAEI

#103801 - 11/26/02 09:49 PM Re: It's a non-powered mock-up  
HotLine1  Online Content


Member
Joined: Apr 2002
Posts: 6,803
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


John

#103802 - 11/26/02 09:54 PM Re: It's a non-powered mock-up  
HotLine1  Online Content


Member
Joined: Apr 2002
Posts: 6,803
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


John

#103803 - 11/26/02 09:56 PM Re: It's a non-powered mock-up  
CTwireman  Offline
Member
Joined: Feb 2002
Posts: 840
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


Peter

#103804 - 11/26/02 10:06 PM Re: It's a non-powered mock-up  
resqcapt19  Offline
Member
Joined: Nov 2000
Posts: 2,148
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


Don(resqcapt19)

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