# Thread: Maxium conduit run between pull boxes, NEC Code

1. Junior Member
Join Date
Oct 2007
Posts
17

## Maxium conduit run between pull boxes, NEC Code

Could anyone tell me what is the maximum conduit run (length) between pull boxes per NEC code? And what page of the NEC code book its on? I have the 2002 version of the NEC code book.

2. There is no code requirement for this, contrary to popular belief.

3. There is no maximum length, if you have a means to get a rope or pulling means from one end to the other the length of the rope or pulling means is the only limit.

The issue is not having more than 360 deg of bend between pull points, see any of the conduit articles, 3xx.26

Roger

4. I asked that same question about a year ago. Someone asked me that question at work

5. There is also a limit based on the pulling calculations. It does no good to pull on the conductor with so much force that it breaks, or that you crush the inslulation as a result of excessive sidewall pressure when pulling around bends.
Don

6. For some reason I thought it was 500'.

7. Originally Posted by jrannis
For some reason I thought it was 500'.
If you can produce a code article to support what you think, then we will all know what you thought :smile:

8. Functionally, pulling tension calcs and number of bends aside, the limit is often based on several more practical factors:
• length of the pull rope to be used
• amount of space available to payoff the conductors
• amount of space available to re-reel or stack conductors at the next pull point
• amount of labor available to make the pull
• amount and type of equipment available to make the pull

9. Air compressor - High CFM? Check.

Bucket of Jetline? Check.

"Stand clear the gear!"

DISTANCE UNLIMITED!

10. Originally Posted by don_resqcapt19
There is also a limit based on the pulling calculations. It does no good to pull on the conductor with so much force that it breaks, or that you crush the inslulation as a result of excessive sidewall pressure when pulling around bends.
Don
Mention pulling calculations to the average field electrician, and even the above average electrician, and you will most likely get the "deer in the headlights" response. I'm not saying it's right, but there is widespread ignorance of their importance. When it comes right down to it, the mentality of pulling seems to be "Get er done!"

I had no clue about them before I came here, and then I realized I was probably involved in a few pulls that were...shall we say....a bit over the line of sidewall pressure.

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