Pull box req's in NEC.

[miker27]

Guys, is there any requirements by the NEC stating the min length of straight underground conduit run that should be provided by an exposed pull box? lets say the total length of the conduit run is 250 meters? how many pullboxes should be provided and its span to each other? thanks for your help....:smile:

 

[roger]

There is no requirement for pull boxes in a given length however, there can be no more than 360 deg's of bends between pull points.

Roger

 

[Pierre C Belarge]

Roger
Is that 360 degrees F or C ?

 

[roger]

Roger
Is that 360 degrees F or C ?

I guess it would depend on how heated the people on the pulling end would get while making the pull. :wink:

Roger

 

[masterinbama]

and the length of wire or cable that you can get

 

[ITO]

There also may be a specification that came with the job that may require a pull box every so many feet, that you may be contractually obligated too.

 

[roger]

ITO, the OP is the designer and will probably be writing the specs. :wink:

Roger

 

[bkludecke]

There are also pulling tension issues that can come into play on long runs of big wire.

 

[360Youth]

There are also pulling tension issues that can come into play on long runs of big wire.

Yeah, you pull until the rope breaks and start over. :grin:

 

[Inspectorcliff]

thats good real good

 

[miker27]

okay...thanks guys...:smile: