Are LB’s legal

don_resqcapt19

don_resqcapt19

Moderator
Staff member
Location
Illinois
Occupation
retired electrician
tortuga said:
Its interesting in the case of PVC I don't know of any conduit bodies like that the mogul kind or whatever you can get with rigid.

Yeah a common 2" example is a single phase feeder with 4/0, 4/0, 2/0, and a #4 aluminum XHHW-2 conductors pulled in, thats less than the max permitted XHHW-2 in CH9 C11, so the LB does not need to have 12" between entries.

But then 314.28(A)(3) goes on to say:
Code: 
For other conductor sizes and combinations, the total permitted crosssectional area of the  fill shall not exceed the cross-sectional area of the conductors specified in the marking,
based on the type of conductor identified as part of the product listing.

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That is for a very specific type of LB and not the standard one.  That is the type covered in the second paragraph and is why I said to look at the third paragraph.  Not sure how large they make these in, but this is the only type permitted for the full wire fill of the conduit trade size.  
The third paragraph applies to standard LBs, and they will be marked for the maximum number and size of conductors that they have been listed for.  You can calculate for other combinations based on not exceeding the area of the specified number and size of conductors.
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Dsg319

Dsg319

Senior Member
Location
West Virginia
Occupation
Wv Master “lectrician”
jap said:
The bad thing is the inspector has no say on how I get my wire in the pipe, and, He also won't be there to help when is shorts out and we have to replace everything.

Jap>
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You mean you weren’t required to megger the wires after you beat them in lol?
 
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