Schedule 40 RNC

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gonec

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Is Sch 40 RNC with the marking on the conduit saying "listed for direct burial" allowed to be installed directly into the ground or dose it still need to be incased in concrete?

I read NEC Handbook Article 352 and it gives great references to Type "EB" schedule 40 that always needs to be installed in concrete.

But with the markings on the conduit saying "listed for direct burial" can give someone the false impression that the conduit can be installed indirect burial earth without concrete.

Any thoughts from anybody?
 
Re: Schedule 40 RNC

Schedule 40 - RNC, "listed for direct burial" is high-density polyethylene (HDPE) and may indeed be direct buried subject to other limitations / requirements in Articles 300.5 and 300.50.

Type EB - RNC is polyvinyl chloride (PVC) specifically listed for "encased burial." It is not listed for direct burial.

[Edit] Corrected my dyslexia :eek:

[ August 26, 2004, 04:02 PM: Message edited by: rbalex ]
 
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