Size a large gutter

[jim gage]

I need to size a gutter for 3 sets of 3 in parallel feeders that come down an inside wall and need to enter the top of a gutter and then exit out the back of the gutter through the outside wall and each set of feeders will enter into its own section of a 3 handle main fused switch board. Can anyone help?

 

[dkidd]

Its a wireway, not a gutter. See Article 376.

 

[augie47]

The most common violation I see on such install is 376.23(B)...distance between raceway entries.