In air-handling plenum spaces, which type of cable is specified to minimize smoke production?

In air-handling plenum spaces, which type of cable is specified to minimize smoke production?

• A. Plenum Cabling
• B. PVC-Coated Cable
• C. Shielded Twisted Pair
• D. Coaxial Cable

Answer: (A)

In air-handling spaces you want cables that keep smoke and toxic fumes to a minimum in case of a fire, because the air moves through these areas and would quickly spread any smoke. Plenum-rated cabling is designed for exactly this environment — it uses materials and construction that limit flame spread and reduce smoke production, meeting stricter safety requirements for spaces used to circulate air. That’s why this option is the best choice: it explicitly denotes a cable type approved for use in plenum spaces, aligning with building and electrical codes to keep the ventilation pathways from becoming high-smoke, high-toxicity hazards. The other options describe cables that may be fine for general use but don’t inherently meet the plenum-specific smoke and flame requirements; PVC-coated, shielded twisted pair, or coaxial cables can burn with more smoke and toxic gases and aren’t guaranteed to be suitable for air-handling plenums.

In air-handling spaces you want cables that keep smoke and toxic fumes to a minimum in case of a fire, because the air moves through these areas and would quickly spread any smoke. Plenum-rated cabling is designed for exactly this environment — it uses materials and construction that limit flame spread and reduce smoke production, meeting stricter safety requirements for spaces used to circulate air.

That’s why this option is the best choice: it explicitly denotes a cable type approved for use in plenum spaces, aligning with building and electrical codes to keep the ventilation pathways from becoming high-smoke, high-toxicity hazards. The other options describe cables that may be fine for general use but don’t inherently meet the plenum-specific smoke and flame requirements; PVC-coated, shielded twisted pair, or coaxial cables can burn with more smoke and toxic gases and aren’t guaranteed to be suitable for air-handling plenums.