Where Can Type CMR Communication Riser Cables be Used?

Explanation:

Type CMR communication riser cables are permitted to be used in in-wall and riser applications. In-wall cables are used for vertical risers between floors or in walls, while riser cables are used for vertical risers that connect floors or separate buildings.

However, they are not permitted to be used in plenum areas. Plenum areas are spaces used for air circulation, such as drop ceilings or raised floors, where special plenum-rated cables are required.

It is important to follow the regulations and guidelines regarding the use of different types of cables in specific locations to ensure safety and compliance.