no-splices wire pulling

[gap]

Hello all,
Just wondering how everyone else tackles these types of wire pulls...typically on control or fire alarm systems which specify no splices in any junction box--all in conduit. So let's assume we 've roughed in a main trunkline with junction boxes--each with several runouts to devices which the conductors/cables terminate. What method would you use to pull the bundle of cables out to each device. In the past we've measured each leg of the conduit as we rough-in, then cut all the conductors to length by adding up all the box-to-box runs and bundle them together. Then beginning at the controller can, we pull all the wire through the trunkline to the first box and pull out all the conductors which run-out to devices. Rebundle and pull the remaining wires to the second junction in the trunkline and repeat...This method has worked, but is really slow. Does anyone else do it differently?
Regards,
Scott

 

[Ed MacLaren]

Re: no-splices wire pulling

It seems to me, from your description, that this method of pulling from the controller toward the outlets would result in some wires of the main bundle being pulled farther than others, creating friction between the individual wire insulations.

I would suggest measuring the runouts as you described, add on the trunkline length required for each, and pull from the outlets toward the JBs. Pull the trunkline by collecting the runouts and adding them to the main bundle at each JB, with the final pull being into the controller.

Ed

 

[a.wayne3@verizon.net]

Re: no-splices wire pulling

If you know the desired pull distance plus enough to make up & for radius bends plus a desired waste length then start from the middle,why pull more than you have to.If done this way and calculated correctly it works fine !!!Less time,pulling heart ache !!

 

[dcv]

Re: no-splices wire pulling

gap
It seems to me you have been doubling your work,
why not reverse your pulling direction, start at your first truckline box and pull back to your controller then pull the rest down to your devices.In other word start in the middle and pull both ways.Why pull the drops thru the trunkline ?