Conduit bodies sizing

[jnthn00]

Does the MAX VOLUME inside an LL only apply if splicing conductors? I'm running a single 2.5" EMT from a distribution board to a panel, and the wire required is 4-4/0 and a #4G. My calcs bring the total cu in to 1.3772 and the max stamped is 3-250s (total cu in=157.3) Does this require me to upsize the LL to a 3.5"? I am not splicing.

 

[Dennis Alwon]

Does the MAX VOLUME inside an LL only apply if splicing conductors? I'm running a single 2.5" EMT from a distribution board to a panel, and the wire required is 4-4/0 and a #4G. My calcs bring the total cu in to 1.3772 and the max stamped is 3-250s (total cu in=157.3) Does this require me to upsize the LL to a 3.5"? I am not splicing.

IMO, yes you must upsize the LL

 

[infinity]

Your calculation should be based on 6X the trade side of the 2.5" EMT not the cubic inch area.

 

[texie]

Does the MAX VOLUME inside an LL only apply if splicing conductors? I'm running a single 2.5" EMT from a distribution board to a panel, and the wire required is 4-4/0 and a #4G. My calcs bring the total cu in to 1.3772 and the max stamped is 3-250s (total cu in=157.3) Does this require me to upsize the LL to a 3.5"? I am not splicing.

If you are on the 2017 edition, there is new language in 314.28(A)(3) to allow the equivalent for different conductor sizing and number than is marked. But I don't think in your case it will help you as (I didn't do the math) I think 4, 4/0 and 1 #4 is likely much more than 3, 250's.
Better order up that larger LL.