Pulling 16mm SWA through 150 M of conduit?

[terminator]

Because you can't 'feel' when you're actually pulling the cable when it gets tight, plus all your energy is absorbed by the stretchy rope and not into moving the cable.

 

[Engineer54]

While I don't know much about pulling very long cables (and I'm going to be very wary if anyone ever asks me to now), why does it matter if the rope is stretchy? Could it be good to have some stretch in it, to reduce the mechanical shocks to the cable? Perhaps E54 or someone can advise.

Apart from what Terminator has just stated, winches work on the basis of having an adjustable clutch which is set to slip/freewheel at a predetermined torque point, applicable to manufacturers recommendations for a given size and make-up of cable. All the cable winches i've experience of, use steel draw cables (and cable socks), though i have seen some using reinforced rope draws....

The other fact is that you shouldn't even attempt pulling cables into a continuous duct, over very long distances in one go, but then that's another matter altogether.

The point is, if carrying out a cable pull correctly, and the cable winch is continuously going into slip mode, then the pull length and or design of the cable duct is Wrong, and when those that know no better hook the cable pull wire up to a van//lorry/tractor and forcibly drag the cable come what may, through!!