Method for evening tension in a twisted pair electric cable
View Patent ↗A method of evening the tension in the conductors of a twisted pair electric cable during the cable's installation comprising the step of pulling the cable through stlinging rollers while attached to a tension evening device. That allows constant adjustment of the tension in each of the cable's conductors, which prevents an unwanted looping effect and eliminates the need to even the tension at the end of the installation process. The tension evening device comprises a pull rope attached to a swivel that holds a sheave. The device is sized small enough so that it fits through the stringing rollers such that, during the installation of the cable, the entire tension evening device is pulled through. The sheave includes a groove around its outside diameter in which a sheave rope is placed. The ends of the sheave rope are attached to an end of each conductor. The tension in the conductors is maintained by the sheave and sheave rope which rotate in response to the tension or force applied by the conductors, providing greater slack to the higher tensioned conductor and exerting a greater pulling force on the lower tensioned conductor.
1. A method of evening the tension in the conductors of a twisted pair electric cable comprising the steps of:
providing a tension evening device;
attaching an electric cable having more than one conductor to the tension evening device; and
pulling the tension evening device through support blocks on a power pole whereby the tension evening device equalizes the tension in the more than one conductor.
2. The method of evening the tension in the conductors of a twisted pair electric cable of claim 1 , wherein:
the tension evening device comprises a swivel, a clevis and a sheave.
3. The method of evening the tension in the conductors of a twisted pair electric cable of claim 2 , wherein:
the sheave has a groove for the placement of a sheave rope, and the sheave rope has two ends, each attached to a separate conductor of the electric cable.
4. The method of evening the tension in the conductors of a twisted pair electric cable of claim 2 , wherein:
the swivel, the clevis and the sheave are a single component.
5. The method of evening the tension in the conductors of a twisted pair electric cable of claim 1 , wherein:
the step of pulling the tension evening device through the support block rotates the sheave and sheave rope so that it provides greater slack to a higher tensioned conductor and exerts a greater pulling force on a lesser tensioned conductor thereby equalizing the tension in the conductors.