There are 3 sets of 4? conduits each with 4-600kCMIL conductors are required by the contract documents. Only two sets are installed at first and it is caught on a punch list and the third set is required to be installed. The follow up punch list reads ?While the third 4? conduit has been added to the service entrance, the pull box violates NEC 314.28. The box dimensions should be at least 4?X6=24?+4?+4?+32? in width and 8? deep per 314.28(A)(2) Exception reference to Table 312.6(A) for entry in the wall of box opposite a removable cover.? Is this a correct call? See the pictures.
View attachment 8316
View attachment 8317
The 8" deep looks right based on the exception, and
under one interpretation the
height of the box needs to be 4x6 + 4 + 4
= 32 based on 28(A)2 with no exception as a result of the bottom entries. There is no minimum size for the width AFAIK.
But that assumes that the word "row" is used in a way that applies to the three conduits. Since the section talks about multiple rows in the same side of the box, I would rather interpret it to mean, in this case, rows of conduits stacked from the front of the box toward the back. In that case you have three rows of one, and the height only needs to be 24", with no adders. When you think about how the presence of other entries and wires affects the size of the box needed for a clean pull, the second interpretation makes more sense. Is there an illustration in the Handbook that clarifies this?
The 8" depth requirement was there from the start.