Interduct usage in place of conduit

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childofgod

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Can Interduct(high-density polyethylene tubing) be used in place of PVC conduit for underground installations? Are there approved fittings for this purpose? Some of the applications that I am looking at using it for would be low and medium voltage applications. I cannot find applications or products for power, only communications.
 
Re: Interduct usage in place of conduit

I do not belive so (but could be wrong) you need to contact your supply house for the spec's on it.
 
Re: Interduct usage in place of conduit

It's called innerduct for a reason- it is to be used inside other conduit or raceway. Though I have seen it run by itself within buildings, it certainly cannot be direct buried.

I also believe its use is limited to communications. I don't believe the NEC addresses this product and I don't know if it is listed or for what.

The closest you can come to this in a listed product is "smurf tube".

-Hal
 
Re: Interduct usage in place of conduit

Hmmm, Ok, I've never seen it used in direct burial by itself. :eek:

Even so, this stuff is for communications as I said.

-Hal
 
Re: Interduct usage in place of conduit

Hal,
Some HDPE tubing is listed as rigid nonmetallic conduit and can be used just like PVC, except that it is permitted in continuous lenghts for underground installation. It is also available with conductors preinstalled per Article 354. This product is often used for street lighting and traffic signal projects.
Don

[ May 08, 2004, 09:33 PM: Message edited by: don_resqcapt19 ]
 
Re: Interduct usage in place of conduit

Article 354 in the NEC covers non-metallic underground conduit with conductors, which is an HDPE product. A new article for HDPE may be added to the 2005 NEC.
 
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