What is the purpose of a pull box installed in a run of conduit?

The purpose of a pull box installed in a run of conduit is to provide an access point for pulling conductors. When electrical conductors need to be installed or replaced, a pull box makes this task significantly easier, especially when navigating bends in the conduit or when the lengths of the runs are particularly long.

Pull boxes are strategically placed at intervals along conduit runs to allow electricians to effectively manage the pulling process, reducing strain on the conductors and ensuring they are not damaged during installation. This access point is critical, as it allows for easier maneuverability of wires and can also serve as a point to make splices or to provide additional space for wiring within a system. Overall, the design and purpose of pull boxes facilitate a more efficient and safe method of handling electrical wiring.