Pulling
Traditionally fibre optic cables were pulled through cable ducts in the same way as other cables, via a winch line. Every time a bend or undulation in the duct is passed the pulling force is multiplied by a friction dependent factor (which can be reduced by using lubricant). This means that the higher the local pulling force is, the higher the friction will be which the cable is experiencing while being pulled against the internal duct wall. This "capstan effect" leads to an exponential force build-up with pull distance, producing generally high pulling forces.
Read more about this topic: Cable Jetting
Famous quotes containing the word pulling:
“Name me, if you can, a better feeling than the one you get when you’ve half a bottle of Chivas in the bag with a gram of coke up your nose and a teenage lovely pulling off her tube top in the next seat over while you’re doing a hundred miles an hour in a suburban side street.”
—P.J. (Patrick Jake)
“The next moment he was “showing off” with all his might—cuffing boys, pulling hair, making faces—in a word, using every art that seemed likely to fascinate a girl and win her applause.”
—Mark Twain [Samuel Langhorne Clemens] (1835–1910)
“The past goes right on pulling me apart, though I can scarcely remember the people or the issues.”
—Mason Cooley (b. 1927)