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Joined: May 2004
Posts: 162
C
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I'm not at work but I believe the 92 rop has an interpertation from the CMP stating PVC male adaptors do not require a bushing. sorry I can not get the actual reference but email me if you wish I will search on monday

charlie

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Joined: Mar 2001
Posts: 2,056
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I don't see how anyone could call the (maybe smooth) end of a male adapter "rounded".
Install the bushing, and call it a nice looking installation.

Joined: Nov 2000
Posts: 2,148
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charlie,
Quote
I'm not at work but I believe the 92 rop has an interpertation from the CMP stating PVC male adaptors do not require a bushing.
I didn't find any thing in the 92TCR, but did find one in the 95ROP, however I don't think it is a clear cut statement that PVC male adapters do not require bushings.
The panel statement on proposal 9-93 said:
"The code already allows for nonmetallic conduit termination fittings with rounded edges without additional bushings".
This does not clearly apply to male adapters, because they don't really have rounded edges. It is my opinion that the only PVC fittings that have rounded edges are the box termination fitting or an end bell.
Don

[This message has been edited by resqcapt19 (edited 05-13-2006).]


Don(resqcapt19)
Joined: Jul 2004
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Likes: 32
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It is clear this is one of those things that is answered by "it is only a half buck so do it" instead of logic at code language.


Greg Fretwell
Joined: Jul 2004
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BTW if this "smooth rounded edge" is so important, why doesn't it extend to the inside edge of a conduit body entry?
I have some Carlon conduit bodies here and I see very little difference between the edge of a male adapter entry and the conduit body entry. Certainly not enough difference to justify extra protection for one and not the other.


Greg Fretwell
Joined: Jun 2003
Posts: 681
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Lets not forget the bushing is supposed to be installed before the conductors are pulled. Not after the conductors are pulled and you say... see the PVC is not damaged.

Like Merci Mark, I have seen PVC damaged during pulls, that also caused damage to the conductors.


Pierre Belarge
Joined: Jan 2003
Posts: 4,391
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Quote
Lets not forget the bushing is supposed to be installed before the conductors are pulled

I guess that is technically true but I seldom install bushing before the pull on any raceway type.

I may install them on the feed end but never on the pull end.

If you install the bushing on the pull end it will either be ruined by the rope or broken by the wire 'head' coming into the enclosure.

There is also the fact that when using pulling equipment a bushing prevents connecting the puller to the raceway.

Bob


Bob Badger
Construction & Maintenance Electrician
Massachusetts
Joined: Apr 2005
Posts: 73
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Member
I do the same thing, but technically I suppose it is not code compliant to put the busing on after wires are pulled. Besides that, I think I have seen more wire damaged by poorly made joints than I have lack of bushing on pulling end of run (RNC or RMC).

Unless you have a bad pulling angle, you won't damage wires on pulling end and if you are going into bottom of box or whatever with wires continuing on up to top of box for termination you are not likely to cause any damage with or without a bushing.

Joined: May 2004
Posts: 162
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Sorry I have been away from this topic, I agree with Don regarding the issue of smooth Vs not smooth, but I posed this same question to a manufacture and I received this proposal and panel statement to support the absence of insulating bushings on such installations. As some one mentioned it may be an issue of interpretation.
Charlie

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