6 3/O in 2.5" Emt
- Thread starter arnettda
- Start date
- Status
- Location
- Windsor, CO NEC: 2017
- Occupation
- Service Manager
How many 90's, how long a run, etc?
bradleyelectric
Senior Member
- Location
- forest hill, md
do it. Make sure you are good at making up the head and use plenty of lube. do you have the brawn?
- Occupation
- Licensed Electrician
Man power was all that was needed to build the pyramids.
~Shado~
Senior Member
- Location
- Aurora, Colorado
Also...can you use gravity to your benefit?
Why pull up? Just curious....
Why pull up? Just curious....
dont you want to be doing it first floor down to basement?
(just dont have a spool of anything heavy set up feeding into a conduit that goes straight down 12 floors. I um heard a guy had a problem when he did that :roll: )
- Location
- New Jersey
- Occupation
- Journeyman Electrician
I would use a tugger and pull up. Dropping six-3/0's-90' would require some kind of brake at the top to hold back the weight.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
Why? You have me confused since the o\pull is from the basement to the first floor it would appear that tje pull is no 90 feet vertical.
hardworkingstiff
Senior Member
- Location
- Wilmington, NC
So, a 30' rise x 6 conductors x 2 lbs. per foot (approx.) = 360 lbs of wire to be lifted when pulling up. You also have to overcome friction and that physics law that says things at rest tend to stay at rest.
A tugger can do it easily, but if you can set up a pulley, 3 guys (probably 2) on a rope should be able to handle it. You will probably need 2 in the basement too.
A tugger can do it easily, but if you can set up a pulley, 3 guys (probably 2) on a rope should be able to handle it. You will probably need 2 in the basement too.
3/0 THWN is 574lb per 1000ft. So 30 feet of 6x 3/0 THWN is only 103lb give or take.
ksmith846
Senior Member
- Location
- Port St Lucie, Florida
Whats the load that is going to applied to these 3/0's?
Just curious why there are 6 in the run?
isolated ground for some A/V installer or computer consultant?
or double neutral and full size ground?
- Location
- New Jersey
- Occupation
- Journeyman Electrician
I missed the part about it only being from one floor to another. Even so a tugger makes this a two man job, pulling by hand may involve three or four men.
CopperTone
Senior Member
- Location
- MetroWest, MA
once had to pull 3 - 4/0 through 2 " pvc conduit - 2 guys by hand - 15 ft with 2 - 90's - almost couldn't do it.
my point is - use a tugger. if you don't have one - buy one - you might be doing electrical work for a while - great investment.
You probably would need 6 guys to make that pull by hand. 2 guys with a tugger.
my point is - use a tugger. if you don't have one - buy one - you might be doing electrical work for a while - great investment.
You probably would need 6 guys to make that pull by hand. 2 guys with a tugger.
3 phase conductors and neutral, Specs call for Iso gnd and Gnd to be same size as phase conductors. It is for a CT scanner in a hospital. Is this normal for gnds to be same size as phase cond? Thanks fr all the advice.
hardworkingstiff
Senior Member
- Location
- Wilmington, NC
I posted weight information from this site:
http://www.interfacebus.com/Copper_Wire_AWG_SIze.html
Now that I look at it, the column said "Feet per Pound" and as I scanned it (instead of reading slowly) I read pound per foot. DUH! Thanks for the correction.
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