Because ordinary cable introduces a toxic hazard in the event of fire, special cabling is required in a separate area provided for air circulation for heating, ventilation, and air-conditioning…

Question

Options

• Asmoke boundry area
• Bfire detection area
• CPlenum area
• DIntergen area

• A
  2% (1)
• B
  4% (2)
• C
  87% (40)
• D
  7% (3)

Explanation

Plenum area (C) refers to the space between a structural ceiling and a drop-down ceiling (or under raised floors) used for HVAC air circulation. Because air circulates through this space, standard PVC-jacketed cables pose a toxic smoke hazard in fires - so building codes require special plenum-rated cables (CMP-rated) with low-smoke, fire-retardant jackets in these areas.

Why the distractors are wrong:

• A (smoke boundary area) - not a real networking or building infrastructure term; it describes a concept, not a defined space.
• B (fire detection area) - describes a function (detecting fire), not a structural/architectural zone with a specific cabling requirement.
• D (Intergen area) - a fabricated term with no meaning in networking, cabling standards, or building codes.

Memory tip: Think "HVAC air plenums need plenum-rated cable" - the word "plenum" appears in both the space name and the cable category (plenum cable / CMP), making it easy to link the concept to the requirement.

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