Pull Point

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gregwaits

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:smile:Hi,
I am trying to find the article that list how far to an opening in a run of pipe?

i am looking at a pipe rack that appears to have about 125+ feet with no pull points...plenty of bends close to 360..

thanks for any replies.

gw
 
You won't find an article that limits the length of a conduit run.
You will find one that limits the number of bends.

What exactly is "close to 360?"?
359? or 361??
 
pull point

pull point

hi,
i am sure i saw it in there back in 97 or so...have not looked at that since..

100 feet is what i was thinking the code says but it may be on a stright run I am thinking of...yeah we all know that 360 is maximum for bends between pull points....as far as almost I did not mean 359 or 361....i guess i should have made myself more clear...

i meant it looked like three 90's a 60 and some offsets that were probably 30..

it makes no sense to run that far without a "c" or some fitting...you will spend twice as much time trying to get that pulled....so your productivity is nothing and your conduit crew is costing money...not to mention the damaged cable/wire...

thanks for the reply anyway..

gw
 
There is no 100' rule, that's a myth right up there with receptacles are required to be ground up. As far a C conduit body, for larger conduit that likely won't satisfy the code requirements either for runs over 360 degrees.
 
rabtrfld said:
Isn't there a vertical limit?
Click to expand...

Yup, Lcdrwalker is correct. Vertical conductors require support at given intervals depending on the conductor size. That would make a straight vertical run of conduit still need pull boxes.
 
Alot of times plan specifications will have a limit to the length of conduit between boxes. I know in the past I have worked on projects that had a specification of no more than 100' between pull points.

Chris
 
raider1 said:
Alot of times plan specifications will have a limit to the length of conduit between boxes. I know in the past I have worked on projects that had a specification of no more than 100' between pull points.

Chris
Click to expand...

I think 100' is also a 'BICSI' standard for data / com etc.
 
If you are at a large plant, see if the plant has a spec requirement book for Electrical work, Div16, or however they divvy up the working classifications.
 
Pull Point

Hi,
Thanks for al the replies. I think I saw in an old code book where there used to be a article that covered this but since I dont have an old mid 90's code book then I cant quote it.

Again, thanks.

GW
 
gregwaits said:
Hi,
Thanks for al the replies. I think I saw in an old code book where there used to be a article that covered this but since I dont have an old mid 90's code book then I cant quote it.

Again, thanks.

GW
Click to expand...
As far as I know that was never in the NEC.
 
infinity said:
Yup, Lcdrwalker is correct. Vertical conductors require support at given intervals depending on the conductor size. That would make a straight vertical run of conduit still need pull boxes.
Click to expand...

for large, and heavy, vertical feeders the wire needs to be supported by
wire chocks, and that requires j boxes..... such as you might find in
highrises, like a penthouse mechanical equipment room..

it goes without saying, but i'll say it anyway.... if you have long
vertical pulls of heavy feeders, always feed from the bottom,
never from the top....

randy
 
gregwaits said:
. . . i meant it looked like three 90's a 60 and some offsets that were probably 30. . .
Click to expand...
That is more than 360?. 3-90? is 270?, add 60? gets you to 330? and only leaves you 30? for the rest of the offsets. You say there were 'some' which leads me to think that there were more than 4 at 22??. If memory serves me correctly, you kick 22?? in both directions for an offset for 45? for each offset. You have run over if this is the case. :smile:
 
Rockyd said:
If you are at a large plant, see if the plant has a spec requirement book for Electrical work, Div16, or however they divvy up the working classifications.
Click to expand...
Good advice. Also, the manufacturers will publish pulling charts for their larger cables and wire. You then have to calculate the pulling tensions with and without lube to see if the wire or cable will withstand the pull without damage. :smile:
 
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