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Joined: Oct 2000
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Sent In From the Field for ECN Review 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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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
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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)
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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?)
-Virgil Residential/Commercial Inspector 5 Star Inspections Member IAEI
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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
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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
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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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