What is the purpose of the cable insulation shielding?

The purpose of cable insulation shielding is primarily to protect against moisture and to limit electromagnetic interference. Shielding is designed to create a barrier that prevents external electrical signals from interfering with the signals that the cable carries. This is particularly important in environments where cables are subjected to electromagnetic fields from other electrical devices.

Moisture protection is critical because water can degrade both the mechanical and electrical properties of the insulation material, leading to failure of the cable or interruptions in the service it provides. Effective shielding ensures that the integrity of the transmission is maintained, which is essential for the proper functioning of the network and equipment the cables are servicing.

Other options, while they may describe certain characteristics of cables, do not address the specific role of shielding. Enhancing surface durability, allowing flexibility during installation, or improving thermal resistance are all important traits for different aspects of cable performance, but they do not directly relate to the protective functions that shielding provides against moisture and interference.