Junction Boxes (Pull boxes) Required

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gappvembe

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Dowagiac, MI
Hello all. I've viewed this site often and it has helped me. I'm currently a student studding the NEC and I've had a job of electrical maintenance for about 6 months. Anyway for some reason I remember in one of my classes there being a required J-box (Or pull boxes) after so many feet run of conduit. We are using PVC. But for the life of me I can't find anything in the code book. Help would be appreciated. The run of conduit is strait.
 
There is no requirement in the NEC for a junction every so many feet. This is a design issue, which is not covered by the NEC. You may not have more than 360 degrees of bends between pull points, but no limit on the distance.
 
Re: Junction Boxes (Pull boxes) Required

gappvembe said:
. . . for some reason I remember . . . there being a required . . . .
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This is a good lesson to learn early on. Each of the following is different from all others:
  • What is required because it is in the NEC.
  • What is required because it is in a local code, even though it is not in the NEC.
  • What is required because the Inspector wants to see it done that way.
  • What is required because your employer wants you do it that way.
  • What is required because the contract says to do it that way.
  • What is required because the client wants it done that way, even if that is different from the contract.
  • What you are told is required, even if you are not told the reason it is required.
  • What you remember having been told is required, even though you are not sure when or by whom you were told that.
  • What you are told that the NEC says.
  • What you remember as having been said by the NEC.
  • What you want to do.
One of the privileges of adulthood is the freedom to choose what to do. One of the responsibilities of adulthood is the duty to face the consequences of your choices. If I may be allowed to offer a suggestion, it would be that when you make a choice, you should know the reason that you made that choice. And if the reason happens to be that it is safer that way, you can be sure that you made a good choice.

I wish you the best of fortune in your career choices.
 
That is true. And to the best of my ability I will follow the NEC. Interpretation of it can be tricky sometimes, I've already learned this.
I did look through the code book and didn't find anything, so my next best bet was to search the net. After not coming up with an anwer there it was time to ask. And I know that risking peoples lives, including my own, is not something I want to gamble on unless I'm sure it's safe.
Thanks everyone
 
I think everyone used to believe that you had to have a j-box every 100' and I think the reason for that was when I started in the trades nobody had more than a 100' fish tape. Now with 200 footers available and vacumes and what not, how far you want to run it is up to you.

I find it very commendable that you are willing to take the time to search out the answer and not just rely on one source. Good luck. I've made a pretty good living at this for the last 28 years or so.
 
There are many urban legends in this trade 100 ft between pull boxes is one,there must be a light swich at every door is another,NM is garbage,back stabbing a device is a violation,NM is permitted in underground conduit.Until recently I thought light bulb grease was somewthing a green helper was sent to find but the big O sells it now :shock: So I guess the old wire strecher will have to suffice :twisted:
 
Remember, the N.E.C. is the minimum. You can allways go above the code. When you be crowned as a "piperunner" you will be able to lay out your pipe run with all the boxes,Lb's,LL's,LR's,ect.
The key is keeping updated with the meterials in your area and learning where to use them. 8)
 
allenwayne said:
There are many urban legends in this trade 100 ft between pull boxes is one,there must be a light swich at every door is another,NM is garbage,back stabbing a device is a violation,NM is permitted in underground conduit.Until recently I thought light bulb grease was somewthing a green helper was sent to find but the big O sells it now :shock: So I guess the old wire strecher will have to suffice :twisted:
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Almost agree sept for the nm part,sorry but its at the bottom of the food chain.Its one step better than lamp cord.Yes affordable for homes but far from being great.
 
chicar said:
When you be crowned as a "piperunner" you will be able to lay out your pipe run with all the boxes,Lb's,LL's,LR's,ect.
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Very rarely will I use an LR or LL, IMO they are more trouble than help.

JMO, Bob
 
Jim I didn`t say it was great but it is allowed.Personally I would prefer to see conduit on all house wiring but that really isn`t feasable in todays market.At least not in this area.The norm is for a few hundred dollar profit on a 4 bedroom home using NM and with the price of CU even that is hard to do :shock:
 
aftershock said:
Where I live we are required to have a JB/Pull box for every 100' of conduit run.
May be local code.
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Are you telling me that in a parking lot with more than 100' between lighting poles you need a pull box? Hard to believe. :eek:
 
Where I live we are required to have a JB/Pull box for every 100' of conduit run.
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This could also be an engineers spec. I have seen alot of engineers specs that require a pull box every 100', usually there is an exception for underground runs though.

Just a thought,
Chris
 
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