What is the primary purpose of fittings on conduit ends when cables enter or exit for protection against physical damage?

The primary purpose of fittings on conduit ends when cables enter or exit is to reduce abrasion. When cables pass through conduit, any rough edges or openings can create points of wear on the cable insulation. Fittings are designed to provide a smooth, protective barrier that shields the cables from potential damage caused by friction or contact with sharp edges. This protective aspect is particularly important in environments where cables may be subjected to constant movement or where they are in close proximity to other materials that might cause wear.

While there are other considerations regarding conduit fittings—such as supporting electrical insulation, preventing mechanical stress, and enhancing grounding—the main focus in this context is the prevention of abrasion. By ensuring that cables are not exposed to any surfaces that could compromise their integrity, fittings play a crucial role in maintaining the overall safety and longevity of electrical installations.