raintight fittings

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Praedatus1

Praedatus1

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Portland, Oregon
so my boss says the "original" raintight emt fittings with only the little metal ring are still totally acceptable (as raintight). However, my supplier told me that the only new acceptable raintight fittings are the ones with the silicone gaskets (o-rings) in them.

Is this right? If so, are they covered in the codebook?
 
Praedatus1 said:
so my boss says the "original" raintight emt fittings with only the little metal ring are still totally acceptable (as raintight). However, my supplier told me that the only new acceptable raintight fittings are the ones with the silicone gaskets (o-rings) in them.

Is this right? If so, are they covered in the codebook?
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Yepper! The old standby....110.3.
 
If the fitting has a split compression ring (without any other seal inside the fitting) it is probably not raintight. If the compression ring is solid (like T&B's), they are supposed to be raintight (without any other seal). However, I have heard that the latter design does not always work as well as it should due to conduit and/or assembly issues.

IMHO, a fitting with a separate seal is a better design to make the fitting raintight.
 
Praedatus1 said:
so my boss says the "original" raintight emt fittings with only the little metal ring are still totally acceptable (as raintight). However, my supplier told me that the only new acceptable raintight fittings are the ones with the silicone gaskets (o-rings) in them.

Is this right? If so, are they covered in the codebook?
Click to expand...

UL has revised their listing standard for raintight fittings. The old compression type fittings are no longer listed as raintight.

Chris
 
I'm looking at a Arlington 2007 Product Catalog now and the Zinc Die-cast compression connectors are only listed concrete tight by UL, but my CSA they are listed for both concrete and rain tight.

Arlington makes a separate rain tight compression connector that is listed by UL and CSA as rain and concrete tight. Its steel. I have part numbers if you need them.

-Jared
 
thanks, i use a steel connector/coupling that has a clear silicone gasket inside it, you have to insert the conduit and it "clicks" into place. My boss just doesn't feel like paying for them. They just work waaaaay better than the die cast ones.
 
paul said:
This O-ring thing is just plain stupid IMHO. Might as well take the W off the ratings of all insulation.
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I mostly agree with you. Even conduit with O ring gaskets will eventually get water in them.

Where I see a connector with an O ring being useful is going into the top of a box, with a meyers hub. That way direct rain on the conduit will not seep down in the connector and in the box.

~Matt
 
They do have gasketed die-cast ones - that are just plain lame, the ones with the purple plastic gasket.... Wont buy 'em.... Silly crap inside often catches the conduit, and wont allow the conduit all the way in..

The OLD-STYLE die-cast ones become rain-tight as you throw them over the boarder into Canada. Why you say? Because rain there - is SNOW....
 
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