What type of cables and devices are designed with flame-resistant materials for safety?

Plenum-rated cables are specifically designed with flame-resistant materials to ensure safety in environments where air circulation systems are present, such as in ceilings and under floors that are used for air circulation. These areas, known as plenum spaces, often require higher safety standards because any fire that occurs in these locations can rapidly spread throughout a building through the airflow.

Plenum-rated cables have a special insulation that is less likely to emit toxic smoke and is more resistant to ignition compared to standard cables. This feature makes them the preferred choice for structured cabling in commercial buildings where they are installed in plenum spaces. The regulations governing building code often mandate the use of plenum-rated cables in such areas to maintain safety standards.

Other types of cables, while they may have their own benefits, do not necessarily meet the stringent safety requirements needed for installation in plenum spaces.