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Article 511 Required sealing #204119 11/14/11 12:52 PM
Joined: Mar 2003
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Yoopersup Offline OP
Member
511.9
If a conduit does Not pass thur a Classified
area sealing is Not required.
See page 771 Exhibit 511.1.
If a conduit comes from Outside the building goes up to 28inches then enters a box inside a poured concrete wall it never enters the classified area. Thus Seal not required.
Whatca think??
Same as example on page 771 but conduit comes from outside & stays inside the outer wall.
Yoopers

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Re: Article 511 Required sealing [Re: Yoopersup] #204121 11/14/11 03:09 PM
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HotLine1 Offline
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IMHO, you are correct, no seal required.


John
Re: Article 511 Required sealing [Re: Yoopersup] #204189 11/18/11 11:10 PM
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HotLine1 Offline
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Done???


John
Re: Article 511 Required sealing [Re: Yoopersup] #204201 11/19/11 02:01 PM
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gfretwell Online Content
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It sounded pretty done to me but you probably still need some duct seal to prevent the cold air, condensation thing. That is not a real seal off tho.


Greg Fretwell
Re: Article 511 Required sealing [Re: Yoopersup] #204208 11/20/11 03:55 PM
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Yoopersup Offline OP
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Thanks guys it just what I figured ,

Re: Article 511 Required sealing [Re: Yoopersup] #204226 11/21/11 06:11 PM
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Yoopersup Offline OP
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Just got written up by Local Inspector for doing it.
Guess 90.4 comes into play!
Yoopersup

Re: Article 511 Required sealing [Re: Yoopersup] #204227 11/21/11 06:46 PM
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gfretwell Online Content
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It all gets down to what is "inside". (which side of the wall is the border).
I can put my "flush mounted jelly jar" hat on and see his point. We call the outside wall the border there and let them use Romex to a dry location octagon box.
He must be saying the conduit is traveling through the classified location, inside the wall.


Greg Fretwell
Re: Article 511 Required sealing [Re: Yoopersup] #204230 11/21/11 09:37 PM
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HotLine1 Offline
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I take Yoops job from the OP as the box and conduit being encased in a poured concrete wall. I can't see how that can be 'in' the classified area, also with the dimensions he posted.

On that thought, unprotected service conductors encased in 2" of concrete are 'outside the structure'. Although Yoop did not provide wall thickness dimensions, or a conduit size. it sounds like it could be 2"+ encased in poured concrete.



John
Re: Article 511 Required sealing [Re: Yoopersup] #204235 11/22/11 09:52 AM
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Yoopersup Offline OP
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Right he says even thought its in 2 inches Concrete coming from outside its in classified area. I disagree. \
Conduit comes below ground up Outside poured wall to Panel.
I know this area was revised in 2005 but I didn;t find that deleted??
Yoopersup

Re: Article 511 Required sealing [Re: Yoopersup] #204241 11/22/11 04:16 PM
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Yoopersup Offline OP
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[Linked Image]

Last edited by electure; 11/22/11 11:23 PM. Reason: to add image from Photo Gallery
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