What can be used as a pulling line in a conduit that lacks a dedicated pull line?

Using an unused cable already installed in the conduit as a pulling line is a practical and resourceful choice. This method allows for a smoother and potentially safer installation process. The unused cable can effectively serve as a pulling medium because it is already present in the conduit, eliminating the need for additional materials or tools.

Moreover, because the line is already installed, there is no risk of introducing new obstacles or damaging the conduit during the process, and it can often handle the necessary tension without issues. The characteristics of the cable—assuming it is not damaged or compromised—make it a suitable option for facilitating the pulling of new lines through existing pathways.

In contrast, choosing a new cable would likely involve extra work and resources, including purchasing or preparing a new line, while using an old fiber-optic cable may not be ideal since fiber cables are generally delicate and not designed to serve as pulling lines. A metal wire, while strong, may not be flexible enough to navigate the curves and turns of a conduit effectively, increasing the risk of damaging existing installations.