What type of UTP cabling is used in building open-air returns to reduce the amount of population created if a fire should occur?
A) XPS
B) Nonplenum
C) Plenum
D) PVC
C
Explanation: Plenum UTP cabling is typically used in open-air returns because of its characteristics when it is introduced to a fire. The fumes that are created in this situation are reduced with plenum cabling to reduce the amount of toxicity to individuals located in the building.
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