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-   -   Junction for too many conduit turns? (http://www.diychatroom.com/f18/junction-too-many-conduit-turns-31929/)

jamiedolan 11-15-2008 03:16 PM

Junction for too many conduit turns?
 
358.26 States: "There shall not be more than the equivalent of four quarter bends (360 degrees total) between pull points"

When a long run that requires more than 4 quarter bends, do I just add a small junction box, like a 4"x4" metal box for a piece of 3/4" EMT that has 3 - #6 running through it without junctioning.

Thanks
Jamie

darren 11-15-2008 03:30 PM

You nailed it on the head. Once you have more then 360degrees of bend you need a junction box(or in this case a pull box). There is no need to make joints in here(you can if you want) it will just make it easirer for pulling.

nap 11-15-2008 03:44 PM

along with darrens advice, I add;

you do not have to wait until after 360 of bends. Engineer your work so the pull box is where it benefits you. The limitation is no more than 360 between pull points; there is no minimum.

jamiedolan 11-15-2008 05:04 PM

Thanks guys for the help. I will look for theose pull boxes and see what they cost. I have been using a lot of 4"x4" metal boxes that accept a 1/2" or 3/4" connection, I have been getting them for $2. I bet a pull box is easier to use with the additional space.

Jamie

nap 11-15-2008 05:24 PM

Quote:

Originally Posted by jamiedolan (Post 185438)
Thanks guys for the help. I will look for theose pull boxes and see what they cost. I have been using a lot of 4"x4" metal boxes that accept a 1/2" or 3/4" connection, I have been getting them for $2. I bet a pull box is easier to use with the additional space.

Jamie

a pull box is merely a term. Those boxes you have been using can be used as a junction box or a pull box. A pull box, or point, is merely someplace where you can pull the wire from or too.

You can continue to use those boxes or any sized box you want to use.

micromind 11-15-2008 05:26 PM

Any type of box will do. You can use a 4 square, a single-gang handy box, even a 'C' condulet. When you connect the conduit to the box, if you make the two conduits in line with each other, you'll be able to pull the whole run straight through. This saves time, and eliminates the possibility of skinning the insulation off of the wires.

Rob

jamiedolan 11-15-2008 05:33 PM

Quote:

Originally Posted by nap (Post 185450)
a pull box is merely a term. Those boxes you have been using can be used as a junction box or a pull box. A pull box, or point, is merely someplace where you can pull the wire from or too.

You can continue to use those boxes or any sized box you want to use.

Oh ok, Good, Thanks. I just searched for Pull Box and saw some photos of these larger square boxes with a hinged cover that are about 8"x8" and 4" deep or so. I have seen many of them used in commercial.

Thanks for the clarification.
Jamie

darren 11-16-2008 08:15 AM

pull box is just a term not an actual product.

Pull Box=Junction Box
Junction Box=Pull Box

Use one of your 4x4 and put it were it is most conveniant to you.


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