How is rigid conduit attached inside a junction box?

The method of attaching rigid conduit inside a junction box typically involves the use of a bushing. A bushing is an insulator that fits inside the conduit and provides protection for the wire as it enters the junction box, helping to prevent any damage that could occur due to the sharp edges of the conduit. The bushing aids in securing the conduit while ensuring that the wires passing through are insulated and protected from potential abrasion. This method aligns with electrical code requirements, providing both safety and durability in the installation.

While clamps can be used to support conduit runs, they are not primarily designed for direct attachment to junction boxes. Screws may secure the junction box itself, but they do not specifically connect the conduit to the box. Adhesives are generally not used in this application because they do not offer the mechanical strength needed to maintain the rightful positioning of the conduit and do not meet code requirements for electrical installations.