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Old 06-11-2012, 09:22 PM   #16
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Maximum wires in a 2 1/2" nipple


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Originally Posted by elmaur View Post
No junction box. My wire pulls are coming from various areas in the house and through the nipple into the main service panel.
'

where/how are you clamping the romex?
or do you have that nipple full of insulation and PVC sleeving too?

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Old 06-11-2012, 09:24 PM   #17
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Maximum wires in a 2 1/2" nipple


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Originally Posted by stickboy1375 View Post
You could easily install 264 #12 THHN, THWN conductors in a 2 1/2" nipple, I doubt you'll go over... lol... This was using EMT as your nipple, but regardless... I seriously doubt you will have any issues.
Is that quantity 264 #12's?
I will have about ten, maybe twelve, 12/2 romexes, one 6/3 romex and one 6/2 romex. Just as a guess I am thinking that will take up at least 60% of the available space. Am I correct?
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Old 06-11-2012, 09:31 PM   #18
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Maximum wires in a 2 1/2" nipple


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Originally Posted by TarheelTerp View Post
'

where/how are you clamping the romex?
or do you have that nipple full of insulation and PVC sleeving too?
My wires are coming through a ceiling chase down a sheetrock wall which is open- wires will end up behind the sheetrock- and through the nipple which passes through the exterior wall into the panel. Do I need to clamp the wires somewhere in the sheetrock wall?
What about insulation, PVC?
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Old 06-11-2012, 09:34 PM   #19
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Maximum wires in a 2 1/2" nipple


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Originally Posted by elmaur View Post
My main service panel is mounted on an exterior wall. I have a 2 1/2" x 10" nipple connected to the back of the panel going through to the interior of a sheetrock wal

Eh, I think this could be a problem,


NEC 312.5(C) requires that where cable is used, each cable must be secured to the cabinet, cutout box or meter enclosure. Because installers repeatedly violated this rule and jammed in multiple nonmetallic cables through a large PVC connector, a new requirement was added to the 2002 NEC that appears now in NEC 312.5(C) Exception. This exception permits cables with entirely nonmetallic sheaths to enter the top of a surface-mounted enclosure through one or more nonflexible raceways not less than 18 in. and not more than 10 ft. in length, provided the following conditions are met:

(a) Each cable is fastened within 12 in.—measured along the sheath—of the outer end of the raceway.

(b) The raceway extends directly above the enclosure and does not penetrate a structural ceiling.

(c) A fitting is provided on each end of the raceway to protect the cables from abrasion, and the fittings remain accessible after installation.

(d) The raceway is sealed at the outer end using approved means in order to prevent access to the enclosure through the raceway.

(e) The cable sheath is continuous through the raceway and extends into the enclosure beyond the fitting not less than in.

(f) The raceway is fastened at its outer end and at other points in accordance with the applicable article.

(g) Where installed as conduit or tubing, the allowable cable fill does not exceed that permitted for complete conduit systems by Table 1 of Chapter 9 of the NEC and all applicable notes thereto.

Remember, this exception can be used only with surface-mounted enclosures and using nonflexible raceways.



IMO, the only code compliant way for you to do this install is to have a junction box on the end of that nipple and terminate your wires in that box and use THHN into the panel enclosure.

Last edited by stickboy1375; 06-11-2012 at 09:37 PM.
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Old 06-11-2012, 09:36 PM   #20
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Maximum wires in a 2 1/2" nipple


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Originally Posted by elmaur View Post
Is that quantity 264 #12's?
I will have about ten, maybe twelve, 12/2 romexes, one 6/3 romex and one 6/2 romex. Just as a guess I am thinking that will take up at least 60% of the available space. Am I correct?
I was referring to individual conductors, not cables...
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Old 06-11-2012, 10:17 PM   #21
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Maximum wires in a 2 1/2" nipple


Don't forget note 9 to table1 chapter 9. The OP should check with the local EI and find out if the nipple is acceptable on his area. Where does the OP live?
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Old 06-11-2012, 10:23 PM   #22
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Maximum wires in a 2 1/2" nipple


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Don't forget note 9 to table1 chapter 9. The OP should check with the local EI and find out if the nipple is acceptable on his area. Where does the OP live?
Tucson,AZ. I believe in one phone discussion I had with a plans examiner I mentioned the nipple. What would be the issue with it? I figure it to be the correct way to go to protect the wires going through the brick wall. I should probably consult a local licensed electrician to iron out all the details.
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Old 06-11-2012, 11:04 PM   #23
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Maximum wires in a 2 1/2" nipple


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Tucson,AZ. I believe in one phone discussion I had with a plans examiner I mentioned the nipple. What would be the issue with it? I figure it to be the correct way to go to protect the wires going through the brick wall. I should probably consult a local licensed electrician to iron out all the details.
I know in some states out there it is common practice to run all the wired through one large bushing. Here in new jersey it is not acceptable. Consult with a local electrician and get his thoughts on the matter.
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Old 06-12-2012, 06:32 AM   #24
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Maximum wires in a 2 1/2" nipple


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I know in some states out there it is common practice to run all the wired through one large bushing. Here in new jersey it is not acceptable. Consult with a local electrician and get his thoughts on the matter.
I don't see how this would conform to 312.5 (C)....
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Old 06-12-2012, 08:35 AM   #25
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Maximum wires in a 2 1/2" nipple


I think it's because some areas require a disconnect outside. It's cheaper to put the whole panel outside rather than install a separate disconnect.
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Old 06-12-2012, 09:06 AM   #26
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Maximum wires in a 2 1/2" nipple


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I don't see how this would conform to 312.5 (C)....
I have posted my thoughts on this on ElectricianTalk.com and was informed that is how it is done. I know it doesn't conform to 312.5 but different states have different requirements.
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Old 06-12-2012, 01:22 PM   #27
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Maximum wires in a 2 1/2" nipple


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I have posted my thoughts on this on ElectricianTalk.com and was informed that is how it is done. I know it doesn't conform to 312.5 but different states have different requirements.
I agree, but it doses seems standard practice for that part of the country!
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Old 06-12-2012, 05:08 PM   #28
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Maximum wires in a 2 1/2" nipple


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I have posted my thoughts on this on ElectricianTalk.com and was informed that is how it is done. I know it doesn't conform to 312.5 but different states have different requirements.
IF that state doesn't have a amendment on that section of the NEC, then the inspectors are just not doing there job.... and i've heard about how the mid west guys roll.... They do it because nobody says anything... plain and simple.

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