Minimum width of wireway

[rhovee]

So I don't have the ability to draw a picture, but picture (2) 4" conduits coming out of slab and terminating into a panel. Next to the panel is a bunch of home run conduits. So what I did was run a 8x8 inch wireway under the gutter and used close nipples wih double locknuts between them. I know there is a table for minimum wire bending and width of gutter but I am not sure how it would apply to this situation. The wires are 750 AL.

 

[iwire]

Lets see if I understand what you have

• Two 4" conduits up from the slab
• Into a wireway mounted horizontal with the cover facing toward us.
• From there two 4" nipples continue the feeders into the panel.

If that is what you have I don't think you are going to like the answer.

376.23 Insulated Conductors. Insulated conductors installed
in a metallic wireway shall comply with 376.23(A) and (B).

(B) Metallic Wireways Used as Pull Boxes. Where insulated
conductors 4 AWG or larger are pulled through a wireway,
the distance between raceway and cable entries enclosing
the same conductor shall not be less than that required by
314.28(A)(1) for straight pulls and 314.28(A)(2) for angle
pulls. When transposing cable size into raceway size, the minimum
metric designator (trade size) raceway required for the
number and size of conductors in the cable shall be used.

314.28(A)(1) Straight Pulls. In straight pulls, the length of the box
or conduit body shall not be less than eight times the metric
designator (trade size) of the largest raceway.

314.28(A)(2) Angle or U Pulls, or Splices. Where splices or where
angle or U pulls are made, the distance between each raceway
entry inside the box or conduit body and the opposite
wall of the box or conduit body shall not be less than six
times the metric designator (trade size) of the largest raceway
in a row. This distance shall be increased for additional
entries by the amount of the sum of the diameters of all other
raceway entries in the same row on the same wall of the box.
Each row shall be calculated individually, and the single row
that provides the maximum distance shall be used

So if they are straight across from each other the wireway would be 8 x 4" or 32" minimum wide.


If they are angled it would be 6 x 4" plus any others in that row.


Bottom line the 8" is not even close, realistically you can't run the 4" through the wireway under a panel.