code compliance

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dbaird1

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I have an inspector who is asking if an aluminum LB with gasket and cover are rated for outdoor locations.This application is on a rooftop and have never heard this one, any answeres?
 
dbaird1 said:
I have an inspector who is asking if an aluminum LB with gasket and cover are rated for outdoor locations.This application is on a rooftop and have never heard this one, any answeres?
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Manufacturers are usually the best source for design/rating documentation.

I've never heard of a conduit body with gasket that was not outdoor rated.

Code aside, I would think that aluminum is better than steel on a roof-top.
 
The only thing I can think of is....
you buy a LB and install it....
then at some later time you buy the cover and gasket and install them...
at which point you realize the LB is a set-screw variety but the wire is already pulled and landed......
maybe the inspector won't notice :roll:


If the LB is threaded, wouldn't it be outdoor rated based on that alone?
 
walkerj said:
Why would it have a gasket if it wasn't designed to withstand moisture:-?
Click to expand...

I just happen to have taken a picture or two about this....

:::pLEASE STAND BY::: :wink:
​
 
Sorry for the delay....

These pictures were shot at the job trailers:


0930080952c.jpg


0930080952.jpg


When I opened the LB, water just flowed - might as well have been a plumbing line :)

The "T" apparently drianed 99% of it's contents into the LB.

Both condulets had covers and gaskets....why was there so much water?
The EMT had been in place for only about 2 months.
[I do notice the fittngs don't have the tell-tale green tagging...why? I don't know? This was a repair job for us after the fact]


My question is:
Does a gasket really do anything other than just keep the water inside the fitting/pipe run?
 
dbaird1 said:
I have an inspector who is asking if an aluminum LB with gasket and cover are rated for outdoor locations.This application is on a rooftop and have never heard this one, any answeres?
Click to expand...

So tell him yes. ;)
 
celtic said:
When I opened the LB, water just flowed - might as well have been a plumbing line :)

The "T" apparently drianed 99% of it's contents into the LB.

Both condulets had covers and gaskets....why was there so much water?

My question is:
Does a gasket really do anything other than just keep the water inside the fitting/pipe run?
Click to expand...
We'd have to see the rest of the install to see how the water got in, but it does show why wires have to be W rated even in conduit outdoors.

I drill two 1/8" holes in the lowest places, fittings, and/or boxes in everything I install outdoors.
 
LarryFine said:
We'd have to see the rest of the install to see how the water got in, but it does show why wires have to be W rated even in conduit outdoors.
Click to expand...

I guess I'll be taking some more pix :smile:
 
i would also think if it is threaded it is listed for wet location, unless it is marked to say otherwise
 
I thought there is a code article for both, induce a drain(away from service) and use green fittings for outdoor use, 08'...
 
Regarding threaded or not, as long as it meets 110.3(B) it'll be okay. As far as threaded, or not, I try to remember that form seven covers have a "7" shape to catch the inside lip, form"8" has a figure 8 race track design on it.
 
celtic said:
Sorry for the delay....

These pictures were shot at the job trailers:


0930080952c.jpg


0930080952.jpg


When I opened the LB, water just flowed - might as well have been a plumbing line :)

The "T" apparently drianed 99% of it's contents into the LB.

Both condulets had covers and gaskets....why was there so much water?
The EMT had been in place for only about 2 months.
[I do notice the fittngs don't have the tell-tale green tagging...why? I don't know? This was a repair job for us after the fact]


My question is:
Does a gasket really do anything other than just keep the water inside the fitting/pipe run?
Click to expand...

Water usually builds up in conduits due mainly to condensation (and a lot can easily build up in a short time) and probably to a lesser extent from water wicking in throught the threads on the condulet bodies and fittings.

On the conduit run to my attic here at the apt. I cut a small notch in the bottom of the gasket on the LB at the panel to allow water buildup to drain.

A samall hole at the low points as suggested before is also a good idea, if the condulet body is above any possible pooling of water. :)
 
LarryFine said:
Manufacturers are usually the best source for design/rating documentation.

I've never heard of a conduit body with gasket that was not outdoor rated.

Code aside, I would think that aluminum is better than steel on a roof-top.
Click to expand...
a/u coduit bodies wont rust for sure, over time Ive noticed the steel covers along with the screws corrode rapidly. ESP. near tidewater regions.
 
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