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#107262 - 10/27/04 11:29 PM Terminating PVC  
electure  Offline


Member
Joined: Dec 2000
Posts: 4,259
Fullerton, CA USA
How do you terminate underfloor/underground conduits when they come up into an open bottomed enclosure.

Obviously, I think this is not the best way.
Is it a violation?


[Linked Image]


Most of the wholesalers I know don't even stock endbells, and it's a very rare thing to find them installed anywhere.


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#107263 - 10/28/04 09:02 AM Re: Terminating PVC  
dmattox  Offline
Member
Joined: Oct 2004
Posts: 265
Anaheim, CA
I've always cut them about that height, but removed any burs and wouldnt leave the sharp edges like they did. I'll flip a coin if I put a coupling on the end. Some inspector might tag you for not protecting the wires I guess, but to me it would be a stretch, its PVC for goodness sake. Worst case, if you ever get tagged, put a PVC Box connector and then a plastic bushing. Have the PVC bushing protect the wires from the PVC pipe! [Linked Image]

But yes, the broken edges in that picture bug me.


#107264 - 10/28/04 09:20 AM Re: Terminating PVC  
Ryan_J  Offline
Moderator
Joined: Aug 2003
Posts: 1,374
West Jordan, Utah, USA
How about a plastic bushing on those raceways that contain conductors 4 AWG and larger?

300.4


Ryan Jackson,
Salt Lake City

#107265 - 10/28/04 03:48 PM Re: Terminating PVC  
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
dmattox
Quote
Some inspector might tag you for not protecting the wires I guess, but to me it would be a stretch,


It is not a stretch, a bushing is required for PVC regardless of the conductor size.


ARTICLE 352 Rigid Nonmetallic Conduit: Type RNC
Quote

352.46 Bushings.
Where a conduit enters a box, fitting, or other enclosure, a bushing or adapter shall be provided to protect the wire from abrasion unless the box, fitting, or enclosure design provides equivalent protection.


Bob Badger
Construction & Maintenance Electrician
Massachusetts

#107266 - 10/28/04 05:41 PM Re: Terminating PVC  
velect  Offline
Member
Joined: May 2004
Posts: 81
st joseph mi usa
Please use a saw

110-12


#107267 - 10/28/04 06:28 PM Re: Terminating PVC  
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
How about fitting a plastic or metal plate horizontally within the bottom of the enclosure and terminating the conduits with normal fittings through it?

It would mean a lot more work, but it would certainly look neater.


#107268 - 10/28/04 08:15 PM Re: Terminating PVC  
arseegee  Offline
Member
Joined: Jan 2002
Posts: 324
Statesboro, GA USA
I always use a male adapter and plastic bushing when stubbing into gear or xfmrs.


#107269 - 10/28/04 08:36 PM Re: Terminating PVC  
Nick  Offline
Member
Joined: Aug 2001
Posts: 599
Riverside, CA
I always use end bells.
It's also common to see people run branch conduits into hand holes by wrapping the whole bundle (riser) with duct tape. [Linked Image]
Fat chance you will get any kind of bushing on it after its back filled.
Quote
its PVC for goodness sake

I hear that comment all to often. [Linked Image]


#107270 - 10/28/04 09:30 PM Re: Terminating PVC  
John Steinke  Offline
Member
Joined: Apr 2001
Posts: 518
Reno,Nv., USA
I have to say that the code requirement seem superflous; isn't a pvc pipe 'equivalent' in protection to a pvc bushing? Indeed, isn't there mor often sign that the wire insulation abraded the pipe, rather than the reverse?
If this is the worst violation found, I'd have to say "good job!"


#107271 - 10/28/04 09:46 PM Re: Terminating PVC  
electure  Offline


Member
Joined: Dec 2000
Posts: 4,259
Fullerton, CA USA
Sorry, John, I disagree
352.46 ......unless the box, fitting, or enclosure design provides equivalent protection........
I don't see anywhere that it says "conduit"

Sharp edges can cut the insulation (ever cut yourself on PVC? It can be gory).


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