Emt

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There are no raintight electrical metallic tubing (EMT) fittings approved by any nationally recognized testing laboratory at this time. No matter what the box or packaging says. Most manufacturers have removed the listing information, others have not.

Jason
 
jaylectricity said:
Why do they even need to be raintight? The inside of the conduit is considered a wet location, anyway.
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and the conductors are wet location rated.

I don't understand this "raintight / water tight" EMT hardware. Certain stuff in the code is absolute junk and makes no sense.
 
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This is from the UL white book:

PRODUCT MARKINGS
Fittings suitable for use in poured concrete or where exposed to rain are
so indicated on the device or carton. The term ‘‘rain tight,’’ ‘‘wet location’’
or the equivalent on the carton indicates suitability for use where directly
exposed to rain. The term ‘‘concrete tight’’ or equivalent on the carton indicates
suitability for use in poured concrete.
Fittings have been tested for use only with steel tubing unless marked on
the device or carton to indicate suitability for use with aluminum or other
material.

This is from the Bridgeport site about 1/2" EMT raintight connector that has the UL file number.

http://www.bptfittings.com/Home/ProductDetail?id=00781747202505


 
ActionDave said:
That's old news. It was after that study that we ended up with the stupid fittings we have to use now.
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Extremely old news, we've been stuck with the new fittings for 15 years now.

Roger
 
Dennis Alwon said:
That is correct. Not compression fittings but raintite fittings as you said.
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Few EMT raintight fittings, if any, will be something other than compression fittings. But standard compression fittings are not acceptable in wet locations. I've seen raintight setscrew fittings from Crouse hinds for RMC, but never seen the equivalent for EMT.


The distinction between standard compression fittings, is that the raintight fittings come with a gasket at the enclosure interface for connectors, and a plastic sealing sleeve inside the compression assembly. The gland nut will usually be dyed, for ease of distinguishing them. Of course, what ultimately matters is the datasheet and package markings that specify they are raintight.
 
jaylectricity said:
Why do they even need to be raintight? The inside of the conduit is considered a wet location, anyway.
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Exactly. You get more water inside from condensation then even a set screw fitting will allow to leak in my experiences. Maybe the dry southwest is a little different, but any place that sees even moderate humidity will have condensation to deal with.
 
EMT in NYC is banned outdoors. Probably because of acid rains.
If you would ask for raintight emt connectors in supply store they would think you are nuts.
We use aluminum RMC most of the time. It's connectors don't have the raintight listing.
 
darekelec said:
EMT in NYC is banned outdoors. Probably because of acid rains.
If you would ask for raintight emt connectors in supply store they would think you are nuts.
We use aluminum RMC most of the time. It's connectors don't have the raintight listing.
Click to expand...

Is that an actual code or just a job spec?
 
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