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

The term for a part of a wiring system that primarily performs a mechanical function is a fitting. Fittings are components used to link or secure wires and cables in a system. Their primary role is related to the mechanical aspects of a wiring installation, such as connecting cables together, changing their direction, or ensuring they are properly secured in place.

Fittings are designed to not only hold wiring in position but can also help protect it from damage or strain, contributing to the overall integrity of the electrical installation. This distinguishes it from components that may have an electrical function, such as connectors, which facilitate the electrical continuity between wire ends.