What is the difference between plenum and non-plenum rated cabling?

Plenum-rated cables are specifically designed with a fire-resistant jacket, making them suitable for installation in spaces such as air ducts, ceilings, and other areas where they may be exposed to airflow. This fire-resistant property is crucial because, in the event of a fire, these cables are required to emit less smoke and toxic fumes compared to non-plenum cables. This characteristic helps enhance safety in buildings by minimizing the risks associated with fire and smoke inhalation, especially in places where air circulation is involved.

Other types of cables, such as non-plenum rated cables, do not meet the same stringent requirements for fire resistance and may be used in less critical areas. Therefore, understanding the importance of plenum ratings is essential for ensuring compliance with building codes and enhancing safety in environments where electrical cabling is installed.