What does underground cable shielding prevent?

Underground cable shielding is specifically designed to prevent moisture from infiltrating the cable. This is crucial because moisture can lead to corrosion of the conductive materials within the cable, affecting performance and potentially leading to failures. Shielding serves as a barrier that restricts the entry of water and other contaminants, ensuring that the internal components remain dry and functional.

The other factors listed, such as exposure to sunlight, animal interference, and physical damage, are not the primary purposes of underground cable shielding. While some cables might have additional protective measures for those factors, the specific function of the shielding focuses on moisture prevention, which is essential for maintaining the reliability and longevity of underground electrical systems.