CompTIA
220-801 · Question #321
220-801 Question #321: Real Exam Question with Answer & Explanation
The correct answer is C: Plenum. Plenum-rated cable uses a special low-smoke, fire-retardant jacket compound that does not emit toxic fumes when burned, making it required by fire codes in air-handling plenum spaces.
Question
Which of the following cable types is used to prevent exposure to toxins in the event of a fire?
Options
- ACAT6
- BRG-59
- CPlenum
- DPVC
Explanation
Plenum-rated cable uses a special low-smoke, fire-retardant jacket compound that does not emit toxic fumes when burned, making it required by fire codes in air-handling plenum spaces.
Common mistakes.
- A. CAT6 describes the cable's electrical performance category (bandwidth, crosstalk) and does not specify the jacket material or its fire/smoke properties.
- B. RG-59 is a type of coaxial cable used for video signals; the designation refers to its impedance and construction, not fire-safety jacket ratings.
- D. PVC (polyvinyl chloride) is the standard jacket material for non-plenum cable; it releases hydrogen chloride and other toxic gases when burned, making it unsuitable for plenum spaces.
Concept tested. Plenum-rated cable fire safety and toxic fume prevention
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