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Joined: Dec 2000
Posts: 4,293
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I've just found out that EMT compression fittings, which I've always considered to be "raintight," aren't listed for that use at this time.
Has anyone stopped using them for this purpose???...S
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Joined: Jan 2001
Posts: 1,044
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Not me. What are we supposed to do, use GRC or make an ugly looking PVC installation?
I've torn out quite a few outdoor EMT installations & I don't recall seeing any evidence that the connectors & couplings leaked. Of course, one man's experience is limited & this could be a real problem elsewhere.
Few things are harder to put up with than the annoyance of a good example.
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Joined: Sep 2001
Posts: 806
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I use them outdoors, as well, and have never had a problem or been red-tagged by an inspector for it.
On a vertical run (like a service riser), I will often smear a bit of RTV around the top compression nut as added insurance against leaks.
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Joined: May 2002
Posts: 1,716
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Since this came about, I have wondered what caused UL to rescind it's original listing of these fittings. It seems like this could be a credibility awakening for some of their other listings. ![[Linked Image]](https://www.electrical-contractor.net/ubb/eek.gif) I mean, why did this just happen out of the blue, did they decide they had low water pressure the day they originally tested these way back when? ![[Linked Image]](https://www.electrical-contractor.net/ubb/biggrin.gif) Roger
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Joined: Dec 2000
Posts: 4,293
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Bjarney, Currently UL does not list any EMT fittings as raintight..Looks like we're all in a heck of a lot of trouble.
This is ridiculous. Failures are generally caused in the terminations...S
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Joined: Apr 2002
Posts: 2,527
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I agree with Tom. PVC can get pretty seedy looking outside on a building surface.
Don't "W-" and "W-2"-rated conductors buy you anything used outdoors?
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Joined: Aug 2002
Posts: 1,081
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Currently UL does not list any EMT fittings as raintight I thought EMT was not listed for outdoor use--only "rigid" conduit?
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Joined: May 2002
Posts: 1,716
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Joined: Jul 2001
Posts: 599
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Does any one know what part of the connector failed? The connector to box? or the connector to conduit?
Thomas and Betts technical support said that the use of a seperate sealing washer would be suffcient to meet the raintight requirements.
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Posts: 44
Joined: July 2013
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