Question
Why should the outer jacket of coaxial cable be resistant to ultraviolet light?
Answer Options
- A) Ultraviolet resistant jackets prevent harmonic radiation
- B) Ultraviolet light can increase losses in the cable’s jacket
- C) Ultraviolet and RF signals can mix, causing interference
- D) Ultraviolet light can damage the jacket and allow water to enter the cable
Correct Answer: D
Explanation
The outer jacket of a coaxial cable is the first line of defense against weather. When exposed to the sun over time, ultraviolet (UV) radiation breaks down the plastic material of the jacket, causing it to become brittle and crack.
This breakdown compromises the cable’s seal, allowing water or moisture to enter the cable (T7C09). Once water is inside, it rapidly degrades the cable’s performance and causes permanent failure. Therefore, using cables with UV-resistant jackets is essential for all outdoor installations.
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