What is one of the characteristics of plenum cables?

One of the defining characteristics of plenum cables is their low smoke production. These cables are specifically designed for use in environments where they may be exposed to air circulation systems, such as in ceilings and walls where air ducts are located. The materials used to manufacture plenum cables emit fewer toxic fumes and generate less smoke when burned compared to standard cables. This characteristic is crucial for ensuring safety in case of a fire, as it helps reduce the risk of smoke inhalation and improves visibility for evacuation.

This safety feature makes plenum cables the preferred choice in many installations, particularly in commercial buildings and spaces that require compliance with stringent fire codes. The other options, while they may describe some types of cables, do not specifically highlight what makes plenum cables distinct in terms of their intended use in high-risk environments.