Question
Which of the following should be used when installing network cabling above a drop ceiling that is part of the shared air space?
- A. Shielded twisted
- B. Plenum-rated Correct
- C. Optical
- D. Coaxial
Explanation
The space above a drop ceiling that is part of the building's air-handling system is a plenum, and cable run there must be plenum-rated. Plenum jackets resist flame spread and give off less toxic smoke if they burn. Shielding (STP), fiber and coaxial describe what the cable is made of or how it carries signal, and none of them makes a cable fire-rated for an air-handling space.
