Pulling 3 2/0 and one # 6 through 2 inch

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patricknola

Electrical contractor/Generac Dealer
Location
new orleans, La, United States
Occupation
Electrical contractor.
Hey Guys, I've got job where I'm upgrading a t mobile cell tower to from 125 amps to 200 amps. There is existing 2 inch rigid pipe that has 4 lbs I'll have to pull through. I'm pulling in (3) 2/0 copper and a #6 ground. The thing is there are (4) 2 inch lb condulets I've got to pull through, it's a 130 foot pull. So I could take out 80 feet of conduit with the 4 condulets and upsize to 2 1/2 or 3 inch, but I don't want to fight getting this wire through these condulets. Does anyone have suggestions before I get my guys out there. If I don't replace the 2 inch this could be a two day job. Thanks in advance.
 
You need to go with a #4 for the ground as well.

3-3/0 + 1-#4 is OK for 2" RMC.

However, I personally would not want to pull that through 4 LB's. :oops:

Maybe swap for sweeps?
 
The LB would need to be 6X the trade size of the raceway for an angle pull, that means that the opening would need to be a minimum of 12".
 
(3) 3/0 plus ground is big deal at all in 2". Its the Lb's that will not be super fun (but really not the worst thing in the world, its done all the time). Probably not code compliant though, IIRC usually I see 3 2/0 or 3 3/0 listed on 2" LB''s. I would likely replace the LB's with 2 1/2's or 3's.
 
Up sizing the LB's or going with Mogul LBs(expensive) would help out. Mogul LB's are really nice to pull through.
 
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Another option, if the LB's are rated for the 2/0's+G is to stick with 2/0 and use the 90 degree ampacity of the conductors. You would need to splice back to 3/0 however at each end before terminating on the equipment (probably in a separate enclosure).
 
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