RNC - Is a bushing required?

[Newbee]

I have read both 352.46 and 300.4F. Do I have this correct?


If pvc, no matter what size, is terminated at a box, then a bushing is required , but only if the conductor are #4 or larger?


Or are no bushings require on PVC, since according to 352.46, " .....a bushing or ADAPTER shall be provided ...." and since all pvc is terminated at a box ( not a vault or handhole) with an "adapter", the article is satisfied ?

Newbee

 

[Smart $]

A bushing or adapter, or box-design equivalent, is required on the PVC regardless of the size of conductors contained therein. The FPN of 352.46 only makes it appear to be required for #4 and larger conductors.

...and all PVC runs are not terminated at a box with adapters. Many underground PVC runs simply stub up into an open-bottom enclosure.

 

[mdshunk]

If pvc, no matter what size, is terminated at a box, then a bushing is required , but only if the conductor are #4 or larger?

That's the way I practice it, but the code text does say "bushing or adaptor". I know that many guys say that a RNC terminal adaptor serves this purpose, and I tend to agree with that. Additionally, you can terminate a PVC run to a box with a "box connector", which is sorta like a chase nipple, and there's no way to bush that. It's sorta self bushed.

 

[Newbee]

A bushing or adapter, or box-design equivalent, is required on the PVC regardless of the size of conductors contained therein. The FPN of 352.46 only makes it appear to be required for #4 and larger conductors.

...and all PVC runs are not terminated at a box with adapters. Many underground PVC runs simply stub up into an open-bottom enclosure.

I did mention " not a vault or handhole ". But i suppose your might be talking about switchgear as well

Newbee

 

[Newbee]

" If pvc, no matter what size, is terminated at a box, then a bushing is required , but only if the conductor are #4 or larger?"


Ok, I've got one for, and one against.

Anyone else have an opinion here?


Oh, and if the FPN of 352.46 only makes it appear to be required for #4 and larger conductors. what actually does it mean?




Newbee