2" pvc type LB fitting

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nizak

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Has anyone here run into failing a service inspection for having (3) 4/0 AL conductors in a 2"PVC LB fitting. Am being told by ther AHJ that for an LB type fitting(PVC) (3) 3/0 is the max fill. Have always used 2/0 CU in the past and never had an issue but at .88ft for 4/0 AL vs 2.88ft for 2/0 CU had to go with the AL to cut some cost. Thanks.
 
A conduit body is required to be sized according to the 6X and 8X rules used for pull boxes. If the standard conduit body doesn't have that 6X or 8X dimension then you're permitted to install what the manufacturer has stamped on the inside (if anything). Typically when a raceway is near it's maximum fill a standard conduit body will not be code compliant. Inspector is correct on this one.
 
As mentioned earlier the maximum # of conductors is stamped on the inside of the conduit body.

you can always install larger conduit body with reducing bushings or pull box.
 
Yep, the 2"pvc lb's I use have 3-3/0 stamped inside. I saw a nice one at the supply company that basically opens half the LB's depth but I noticed that it is only good for 2/0.

Seems to me if you use aluminum you need to go with a 2 1/2" LB and use reducers.
 
In some instances, if you use an oversized conduit body you'll need to comply with 314.23(E) for support.
 
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I've been turned down before because the inspector cited the 6/8 rule, he didn't care what the manufacture had stamped, one of those deals where you just do it and go on. No use arguing.
 
hillbilly1 said:
I've been turned down before because the inspector cited the 6/8 rule, he didn't care what the manufacture had stamped, one of those deals where you just do it and go on. No use arguing.
Click to expand...

So that inspector didn't need to follow the wording of the NEC?
 
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