What purpose do pull boxes serve in cable management?

Pull boxes serve a crucial role in cable management primarily by facilitating cable pulls through the conduit. When running electrical or communication cables, especially over long distances or through complex pathways with bends and turns, it can be challenging to manage the cables effectively. Pull boxes provide a chamber where cables can be accessed, allowing technicians to pull cables without excessive strain or risk of damaging the wires.

These boxes also help to create smoother transitions and can aid in reducing friction and wear on cables as they are pulled through conduits. By providing a point where cables can be temporarily stored and managed, pull boxes improve the efficiency of installation and maintenance work. This is particularly important when multiple cables are involved, or when there is a need to perform future maintenance or upgrades on the cabling system.

In contrast, the other options do not accurately reflect the primary purpose of pull boxes. Supporting electrical connections and isolating circuits relate more closely to other components in the electrical system, while storing excess cabling is not a fundamental function of pull boxes, as their main design is to aid in the management of cable pulls rather than to serve as storage units.