What is the function of a jack stand in a cable installation?

A jack stand is primarily used in cable installation to hold large cable reels off the floor. This function is crucial because it helps to facilitate the smooth unwinding of cable during installation. By keeping the cable reel elevated, it minimizes friction and potential damage to the cable as it is fed out. It also aids in maintaining a proper lifting position, which can prevent strain and make the installation process safer and more efficient.

In contrast, the other choices don't align with the primary purpose of a jack stand. For instance, while pulling cable may require additional support tools, the jack stand itself is not designed for that purpose. Providing power to installation tools is not a function of a jack stand but rather relies on different equipment, such as power cords and outlets. Labeling cables pertains to identification practices in the installation process and is managed through other labeling tools rather than the jack stand itself.