Why should the outer jacket of coaxial cable be resistant to ultraviolet light?

The outer jacket of a coaxial cable is typically made of plastic or rubber compounds. When exposed to the ultraviolet (UV) radiation in sunlight over time, non-UV-resistant jackets can become brittle, decay, and crack. Once the jacket is compromised, rain and ambient humidity can easily seep inside the cable. Because water intrusion quickly degrades the cable's performance and ruins it, a UV-resistant jacket is essential for any outdoor wiring. The distractors are scientifically inaccurate; UV light does not physically mix with RF signals to cause interference, nor does it directly alter the resistance of the metal conductors inside the shielding.