Conduit Body Fill calculations

[dareelec]

When you are working to calculate this maximum fill of a conduit body based on NEC 314.16 do you treat each wire or conductor as seperate. Example would be having a set of 14awg +/- dc conductors that are spliced inside each body to distribute power to individual modules and continue to the next. This means there are 3 conductors of each spliced together. Are you required to treat each conductor separate for a total of 6 conductors?

 

[Smart $]

Yes... assuming you are talking about a two-wire circuit and no EGC.

 

[Smart $]

What I wonder about is whether the same is true if one uses insulation-displacement connection (IDC) taps... is it 4 or 6???

 

[dareelec]

Yes there is an EGC, and if I have read right, you can treat it as a single conductor.
so there would be a total of 7.
I think this would require a conduit body that has at least 14 cubic inches of volume.
In the end, there is not much allowance for making splices inside conduit bodies in the smaller range of 3/4 sizes. I might have been misled in the past and never personally checked the code.

 

[Dennis Alwon]

If I were to splice in an LB that small I would upsize the LB if possible.