What fitting is commonly used to tighten connections between electrical boxes and RSC conduit?

The fitting that is commonly used to secure connections between electrical boxes and rigid steel conduit (RSC) is the straight connector. Straight connectors are designed to create a secure and reliable mechanical connection, allowing for the transition from conduit to an electrical box or another conduit segment. This type of fitting facilitates proper grounding and provides a robust connection that can handle the physical stresses typically encountered in electrical installations.

Straight connectors ensure that the conduit is properly aligned with the electrical box, helping to maintain efficiency and safety within the system. They are also relatively easy to install, making them a popular choice among electricians. In terms of regulatory compliance, using the correct fittings like straight connectors contributes to overall system integrity, which is a fundamental aspect of electrical installation and maintenance best practices.

Other fittings may be used in different contexts, such as conduit straps for supporting conduit, or lock nuts and bushings for securing wires and protecting them from abrasion, but none of these fulfill the same specific purpose as the straight connector when it comes to connecting RSC conduit directly to an electrical box.