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 (sometimes referred to as HVAC) and typically provided in the space between the structural ceiling and a drop-down ceiling.This area is referred to as the:
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A. B. C. D.C.
Inbuilding construction, a plenum (pronounced PLEH-nuhm, from Latin meaning full) is a separate space provided for air circulation for heating, ventilation, and air-conditioning (sometimes referred to as HVAC) and typically provided in the space between the structural ceiling and a drop-down ceiling.
A plenum may also be under a raised floor.
In buildings with computer installations, the plenum space is often used to house connecting communication cables.
Because ordinary cable introduces a toxic hazard in the event of fire, special plenum cabling is required in plenum areas.
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The answer is C. Plenum area.
The plenum area is a space within a building that is used for air circulation for heating, ventilation, and air-conditioning (HVAC) systems. It is usually located between the structural ceiling and a drop-down ceiling or under a raised floor. In many cases, cables and wires are also run through the plenum area to connect various systems.
The reason special cabling is required in this area is because in the event of a fire, ordinary cables can release toxic smoke and fumes that can spread quickly throughout the building. This can be very dangerous for occupants, especially if they are unable to escape quickly.
Therefore, plenum-rated cables are used in the plenum area. These cables are designed to meet specific fire safety codes and standards to reduce the amount of smoke and fumes released in the event of a fire. Plenum-rated cables are usually made from low-smoke materials that are less likely to emit toxic gases when exposed to fire.
To summarize, the plenum area is a space within a building used for air circulation, and special cabling is required in this area to reduce the risk of toxic smoke and fumes in the event of a fire.