Buried Cable

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Re: Buried Cable

When they installed my new front walkway, I buried three sections of 2" white PVC at spaced locations for future use. Each section was sealed at both ends with a cemented cap. I have used one for the discharge from my sump-pump to the storm sewer (1-1/2 inch pvc running thru the sleeve and still kept the 1/8 per foot slope). I planned to use another for LV wiring to lights. I can't think of anything that prevents a recognized wiring method from passing thru a white PVC pipe as long as it meets all other reqiremements.

Mark

[ June 05, 2005, 01:08 PM: Message edited by: busman ]
 
Re: Buried Cable

This seems a little extreme on the part of the inspector, but I guess it is a supportable argument. My argument against the type of installation you got red tagged on would not center around the white PVC not being listed for use as electrical conduit though
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I'm confused. How is running a conduit through a sleeve of any material the same as running conductors through a plumbing pipe? If the conductors are already installed in a listed electrical conduit than it shouldn't matter if that conduit runs through a sleeve, be it PVC, metal, wood, dirt or whatever. Conductors must be run in conduit, not conduit.
 
Re: Buried Cable

My argument against this installation would go more along the lines of this.

1. Can you use a 4" piece of white PVC as a sleeve to go through a concrete wall? Not a NEC issue but certainly a building code issue. I just don't know the answer to this question. Most of my work is industrial and normally the specs do not allow PVC as a sleeving material for penetrations of concrete walls.

2. How would you seal up the sleeve to prevent moisture infiltration. That would be a lot of caulk. :)
 
Re: Buried Cable

Originally posted by mc5w:
The electrical inspectors around here would flag this as a violation. We tried to use white PVC around grey electrical PVC where it penetrated a foundation and got red tagged on it.
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That is foolish, Electrical PVC was the raceway, you can not fail a raceway for passing through a hole.

That makes as much sense as saying the PVC can not pass through a hole in the foundation because the cement is not a listed raceway.

Originally posted by petersonra:
How would you seal up the sleeve to prevent moisture infiltration. That would be a lot of caulk. :)
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Bob we use PVC sleeves often, we fasten them to the forms before the cement pour.

Once the forms are stripped we can run our raceways through the sleeve, one raceway to a sleeve. The sleeve ID needs to be 2" larger than the raceway OD.

Sealing is usually done with a link seal.

Link Seal

Edit: link

or

"Error L" for link. ;)

[ June 05, 2005, 02:18 PM: Message edited by: iwire ]
 
Re: Buried Cable

Bob, I can't understand what I'm seeing here. :confused:

c150113.jpg
 
Re: Buried Cable

Yeah that is not a good picture.

Follow this link for application photos.

wynn04.jpg


What you have is little rubber pieces that link together to form the correct diameter seal.

Once wrapped around the pipe and slide into the sleeve you tighten a bolt in each link which makes it seal tight.

Up to 20 PSI of pressure.
 
Re: Buried Cable

It's a space robot hand clamp trying to grab that blue thing because it's needed to repair the space ship's hyper-strobulating inertial field generator.
 
Re: Buried Cable

Originally posted by physis:
It's a space robot hand clamp trying to grab that blue thing because it's needed to repair the space ship's hyper-strobulating inertial field generator.
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Wow.....Dude....don't hold out, share whatever it is you got. :D

deadat30.gif
 
Re: Buried Cable

I don't do that anymore but on really rare occassions when the boys are able twist my arm enough. I'm telling you, that's one of the things it's used for! :D
 
Re: Buried Cable

If you didn't put up the other image I could say, "well, whad a you think it is?" :D
 
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