What load capacities are available and how should they be selected?

The cable trunking is offered in multiple load classes as classified by IEC 61537, determined by the dimensional profile, material gauge, and permissible support spacing. Light-duty classes handle small branch circuits with minimal cable weight, while medium and heavy-duty versions support main distribution routes with dense cable populations. Specifiers should select a load class based on total cable weight per meter and installation conditions to ensure deflection-free performance, sustained electrical continuity, and long-term protection of the enclosed conductors.