CommScope ConQuest Conduit Construction - Manual (Page 39)

Pulling Cable into Conduit 5.1
Overview
Pulling Cable into Conduit
There are many variables to consider when pulling cables, and each pull is considered unique. The most important
variable to consider is the maximum pulling tension of the cable, which may be found in one of CommScope’s
product catalogs.
To determine how far cable may be pulled without exceeding the maximum pulling tension, the following factors must
be considered:
• The route geometry, which consists of:
- The number of bends
- The angle and direction of the bends
- The location of the bends
- The distance between the bends
• The fill percentage of the cable(s) in the conduit
• The number of cables being pulled in the conduit
• The configuration of the cable being pulled in the conduit
• The friction between the cable and the conduit
• The back tension created at the setup
These variables may be used to help calculate an ESTIMATED pulling tension. It is important that proper construction
techniques and a breakaway swivel rated for the maximum pulling tension of the cable used to ensure that the
maximum pulling tension is not exceeded. The use of a breakaway swivel will also help minimize the effects of
twisting force. Twisting forces are created by the pull rope (or tape) and by the cable.