What is the primary function of a straight connector in electrical installations?

The primary function of a straight connector in electrical installations is to ensure a tight fit between two conduit sections. This component is critical in maintaining the integrity of the conduit system. When conduits are interconnected, a straight connector serves to align and secure them, preventing any gaps that could allow moisture, dust, or other contaminants to enter the system. This tight connection also helps in maintaining the mechanical strength of the conduit run, ensuring it can withstand various stresses during installation and in use.

While some of the other options address important functions in electrical installations, they do not specifically describe the role of a straight connector. For example, connecting a conduit to an electrical box usually involves a different type of connector or fitting designed for that particular job. Similarly, securing conduits to walls is typically managed by straps or clamps rather than straight connectors, and providing a junction box for wiring pertains to a separate component altogether. Each of these tasks requires specific fittings appropriate to the application, distinguishing their functions from that of a straight connector.