Nec ent

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jonathan walters

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Can someone help settle a dispute by NEC standards is PVC considered ENT? since it has an NEC classification as rigid nonmetalic conduit is it also under the heading of ENT? Or is that more of a trade classification.

Thank you:-?
 
The NEC does not consider Electrical Non-metallic Tubing (tradename Smurf tube) to be Rigid Non-metallic Conduit (tradename PVC). They each have their own code section.
 
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jonathan walters said:
Can someone help settle a dispute by NEC standards is PVC considered ENT? since it has an NEC classification as rigid nonmetalic conduit is it also under the heading of ENT? Or is that more of a trade classification.

Thank you:-?
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Rigid Polyvinyl Chloride Conduit, Type PVC is a wiring method under Article 352, recognized on its own.
Electrical Nonmetallic Tubing is another, different method under Article 362. It must "be made of a material that does not exceed the ignitibility, flammability, smoke generation, and toxicity characteristics of rigid (nonplasticized) polyvinyl chloride." 362.100.
While the construction will allow ENT to be made of pvc, it is not the "PVC" we think of as schedule 40 or 80 in ten foot lengths.

Welcome to the forum.
 
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Pierre C Belarge said:
yes, that is ENT
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Thanx. I just learned something new. We have never used that stuff. I have seen it at the big box stores and thought it was something to use in mobile homes. I have though used 2 of the 4" squares and plaster rings so I could install 2 gang switch boxes back to back in my own home.
 
So I feel it is safe to say that the "blue Stuff" is the only material considered as ENT? The indivdual I had this dispute with tried to use an example of EMT vs Galvinized as both materials being rigid in nature as per Webester's Dictionary. I was not sure if the NEC uses that as its reference. Thanks for the feedback.
 
aftershock said:
Thanx. I just learned something new. We have never used that stuff. I have seen it at the big box stores and thought it was something to use in mobile homes. I have though used 2 of the 4" squares and plaster rings so I could install 2 gang switch boxes back to back in my own home.
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they sell it in 10' stalks at HD and lowes, but at the supply house it comes in 100' rolls like carflex.

i've worked in a lot of commercial buildings that were done completely in ENT. I use it mostly for LV work. And sometimes for locations that would require an awkward pipe bend.
 
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