When you have to pull through a long underground rigid and don't have any help

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Todd0x1 said:
Thanks. Here the footing extended out around a foot from the building wall. Whole thing gets 4" of concrete on top of it so not concerned about burial depth right there. The rest of the trench is 24" deep hence the need for the offset.
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So, the first part of my first sentence.
 
LarryFine said:
So, the first part of my first sentence.
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It wouldn't have cleared the footing. Sorry for bad drawing I need to renew my revit license and have been putting that off until I actually need it. Hope I'm not coming off as argumentative, I appreciate the advice and am here to learn. The offset on my drawing looks more like 45s, but the actual bends are around 22.5
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jusme123 said:
Why are the spools not set up to pull off in same direction?
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By alternating the direction the spools rotate in you prevent one spool from causing slack on another. The more difference there is in the amount of wire on each spool the more this is an issue. At a given pull rate a smaller spool is going to turn faster than a larger one, that faster turning spool is going to help spin the spool next to it which will unspool extra wire and cause tangling. With the spools alternated they just rub against each other and each spool spins at the speed it needs to.
 
jusme123 said:
Why are the spools not set up to pull off in same direction?
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Try his way one time for the reasons listed above, I doubt you will ever set them up to pull off in the same direction again..
 
It all depends on the relative sizes of the elbow and the footing.

Your drawing would work for 1/2", but 2" would look very different.
 
LarryFine said:
It all depends on the relative sizes of the elbow and the footing.

Your drawing would work for 1/2", but 2" would look very different.
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Ok I get it now. With larger conduit the radius on the 45 could be long enough to make it past the footing.

Thanks!
 
Like the funnel idea.



I had to pull 30' run with 3 90s in it my self 1 1/2" EMT can't remember the wire size.

Anyhow the pipe came into the basement near the ceiling. I pulled a rope in the pipe and got it rigged up and at the first 90 it wouldn't move. I had lube on it.

So I hooked a heavy bucket to the rope through a pulley, bucket as close to the ceiling as possible then went to the other end and pushed and it went right in. had to re rig a couple of times to get the whole pull in but it was fine.

I sometimes cut up a plastic Milk bottle and stick the plastic inside an LB to keep from scraping the wires up
 
Todd0x1 said:
The offset on my drawing looks more like 45s, but the actual bends are around 22.5
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Maybe your drawing is not to scale, and maybe there's an issue here I'm missing about field bends vs pre-made bends, but what's the reason to go back to level over the footing, versus just continuing to rise and using a 67.5 degree bend to turn vertical against the building?

Cheers, Wayne
 
wwhitney said:
Maybe your drawing is not to scale, and maybe there's an issue here I'm missing about field bends vs pre-made bends, but what's the reason to go back to level over the footing, versus just continuing to rise and using a 67.5 degree bend to turn vertical against the building?

Cheers, Wayne
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Drawing is to scale on the footing and wall. Pipe is just a line, but the radius on the bends is close to scale. Wanted the pipe to come out of the ground against the building (well 1-5/8 away from the building) without any exposed bend or gap. It fit, it worked, and now the whole excavation is filled with lean mix so theres no going back.....
 
Todd0x1 said:
Drawing is to scale on the footing and wall. Pipe is just a line, but the radius on the bends is close to scale. Wanted the pipe to come out of the ground against the building (well 1-5/8 away from the building) without any exposed bend or gap. It fit, it worked, and now the whole excavation is filled with lean mix so theres no going back.....
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I thought it was a fine looking setup. Like you said, it worked. Veni, vidi, vici...
 
Todd0x1 said:
Ok I get it now. With larger conduit the radius on the 45 could be long enough to make it past the footing.

Thanks!
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other than factoring in diameter difference a 45 degee angle is still 45 degrees and has approximate same path here for the lower plane of the pipe.

The smaller conduit is able to make a full 90 degree bend without exceeding minimum bending radius and more easily able to have that elbow completely below grade in your situation.
 
I've seen racks of wire spools up on the roof of a service van.
Looked strange, seemed clever, worked well, provided a good angle and a smooth entry.
(truck stop, outdoor load center feeding many shore-power receptacles with underground conduit)
 
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