I don't think the strings would contribute much to pulling-in strength as
by the time they had the slack taken out of them and their elasticity taken
up the cable would have been too extended. But I could be wrong. We didn't
do cat 5 cable due to the reluctance of the management at that time to
spend money on the required test equipment. (and upgrading the process
equipment to enable it to manufacture cable that actually met the specs!)

But of course, strings & fibres are added to some cables (e.g. optic fibre
cables) to increase physical strength so it may be possible, particularly
if they are applied under a small amount of pretension. Do the ends of the
string shrink back when cut ? This would be an indication of any preload
applied.

Richard P



Hey - since we have someone here who seems to know something about the
topic I have a follow up question.

Are any of those threads meant for strength when pulling a cable through
conduit, walls, etc?  I'm thinking about the nylon that I find in a lot
of Cat5 cabling that I don't believe is a filler (cable isn't very
round), binder (cable doesn't need it for 4 pair), or ripcord (Cat5
shouldn't be stripped back more than an inch).

Thanks
Dan

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