What kind of box is designed for making electrical splices in conduit runs?

A junction box is specifically designed for making electrical splices in conduit runs. It serves as a protective enclosure that houses connections between different electrical wires, providing a safe and secure environment for splices. The junction box allows for the safe termination of wires and connections, ensuring that they are protected from environmental factors, physical damage, and accidental contact.

In addition, junction boxes are often used when running wires from one location to another, as they provide accessibility for future modifications or repairs. They typically have covers that can be easily removed, allowing for convenient access to the splices inside.

Other types of boxes serve different purposes. For instance, a device box is primarily used to house switches, outlets, or other electrical devices rather than for splicing wires. A pull box is intended for facilitating the pulling of cables through long conduit runs and is not typically used for splices. A utility box may serve various functions, but it is not specifically designed for splicing wires in conduit systems. Thus, the junction box is the most appropriate choice for this application.