If figuring junction box size for 4awg wires and larger, for angle pulls it clearly states to use the largest raceway in the row (regardless of if it's an angle pull conduit or not), for straight pulls it just says largest raceway. I would assume the straight pull figures only need to include conduits doing the straight pull(s). I was told it still is 8x the largest raceway in the row, any help would be great!
314.28 Junction Box Sizing
- Thread starter Awh123
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jumper
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- 3 Hr 2 Min from Winged Horses
Carultch
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- Massachusetts
Remember also that it is distance between raceway entries. Easy to overlook that word. So it is the distance between the nearest pair of edges on the openings you cut for purposes of connecting the conduit. You do not need to account for the assembly of fittings used for terminating.
314.28 Junction Box Sizing
If figuring a junction box size for 4awg and larger conductors, when figuring the straight pull do you take the "largest raceway" that is part of a straight pull x8 or is it the largest raceway "in the row" x8 or the largest raceway "in the whole box" x8? For angle pulls it does say "in the row" so that would mean regardless of what the conduit is doing. But it just says "largest raceway" for straight pulls. Thanks for the help!
If figuring a junction box size for 4awg and larger conductors, when figuring the straight pull do you take the "largest raceway" that is part of a straight pull x8 or is it the largest raceway "in the row" x8 or the largest raceway "in the whole box" x8? For angle pulls it does say "in the row" so that would mean regardless of what the conduit is doing. But it just says "largest raceway" for straight pulls. Thanks for the help!
View attachment 18560
So my questionfor this is what if the straight pull was a 2" conduit? Now the 3" is the "largest raceway" but it's not part of a straight pull?
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jumper
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- 3 Hr 2 Min from Winged Horses
I merged your threads.
wondered what happened.. when I posted I thought no one else had..
makes my post a bit superfluous now
jumper
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- 3 Hr 2 Min from Winged Horses
wondered what happened.. when I posted I thought no one else had..
Not at all. It is right after a direct question and applies. I agree with your answer.
Strathead
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- Electrician/Estimator/Project Manager/Superintendent
On the surface, it is a good question, but as long as the box is rectangular or square, I think you might struggle to find an application. The box must be 18 on all sides minimum for the 3" angle pull. the 2" straight pull would only potentially require 16" if your answer is a yes, but so what, the box is already bigger than that. Find two conduit sizes where that isn't true maybe 1 1/4" and 1 1/2" conduits but my head hurts too much to do the math.
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