What is the term for a part of a wiring system that primarily performs a mechanical function?

The term that refers to a part of a wiring system that primarily performs a mechanical function is "fitting." Fittings are components that are used to connect different parts of the wiring system, ensuring that wires are held securely in place and accurately aligned. Their primary role is mechanical, as they do not typically involve electrical functions like conducting current or joining circuits but rather serve to assemble and stabilize the wiring infrastructure.

Connectors, junctions, and couplers may also play vital roles in a wiring system, but their primary functions lean more towards electrical connectivity rather than just mechanical integration. Connectors and couplers facilitate electrical connections between wires or components, while junctions are points where circuits split or merge. Thus, a fitting stands out as the component focused on the mechanical aspect of the wiring system.