What does a conductor's "insulation rating" indicate?

A conductor's insulation rating is crucial because it specifies the maximum temperature and voltage that the insulation can safely withstand without degrading or failing. This rating is essential for ensuring electrical safety, as it helps to prevent breakdowns that could lead to short circuits, fires, or electrical shock hazards. The insulation must be suitable for the specific application and operating conditions, such as the environment in which the conductor will be used, to maintain electrical integrity and safety.

Other factors such as the thickness of the insulation material, flexibility, and color codes are relevant to the overall performance and identification of the conductor but do not define its insulation capabilities in terms of temperature and voltage tolerance, which are the primary concerns for safe and effective electrical installations.