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#107262 10/27/04 11:29 PM
Joined: Dec 2000
Posts: 4,294
Member
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
Joined: Oct 2004
Posts: 265
D
Member
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
Joined: Aug 2003
Posts: 1,374
R
Moderator
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
Joined: Jan 2003
Posts: 4,391
I
Moderator
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
Joined: May 2004
Posts: 81
V
Member
Please use a saw

110-12

#107267 10/28/04 06:28 PM
Joined: Aug 2001
Posts: 7,520
P
Member
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
Joined: Jan 2002
Posts: 324
A
Member
I always use a male adapter and plastic bushing when stubbing into gear or xfmrs.

#107269 10/28/04 08:36 PM
Joined: Aug 2001
Posts: 599
N
Member
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
Joined: Apr 2001
Posts: 518
J
Member
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
Joined: Dec 2000
Posts: 4,294
Member
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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