What specification must a conductors' insulating material meet when entering a cabinet or box?

The requirement for a conductor's insulating material when entering a cabinet or box to be substantial and rounded ensures that the insulation provides adequate protection against physical damage and potential electrical hazards. Substantial insulation helps prevent wear and tear over time, which is crucial in maintaining the integrity of the conductor and ensuring safety in electrical installations. A rounded profile is often specified to reduce sharp edges that could potentially damage the insulation or create points where wear could accelerate.

This specification is particularly important in environments where wires may be exposed to movement or jostling, helping to protect against short circuits and other electrical failures. The choice of substantial and rounded insulation reflects industry best practices aimed at enhancing the safety and reliability of electrical systems.