N10-009 · Question #421
Which of the following is a location where a plenum cable is recommended?
The correct answer is D. Airspaces above a ceiling. “Plenum” refers to the air-handling spaces in buildings - typically the space above a dropped ceiling or below a raised floor used for air circulation. In these areas, regulations require cables with low-smoke, low-toxicity jacketing, to reduce toxic fumes if there’s a fire…
Question
Which of the following is a location where a plenum cable is recommended?
Options
- AFrequently traveled areas
- BOutdoor environments
- CInside conduits
- DAirspaces above a ceiling
How the community answered
(18 responses)- B6% (1)
- D94% (17)
Explanation
“Plenum” refers to the air-handling spaces in buildings - typically the space above a dropped ceiling or below a raised floor used for air circulation. In these areas, regulations require cables with low-smoke, low-toxicity jacketing, to reduce toxic fumes if there’s a fire. Frequently traveled areas may need more rugged or protected cabling but not specifically plenum-rated. Outdoor environments demand weatherproof or UV-resistant cables. Inside conduits often allow regular PVC-jacketed cable because the conduit provides fire containment.
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