Ethernet cable jacket classification: CMR vs. CMP vs. CM vs. CMX

Classification of the cover of cable ethernet: CMR vs. CMP vs. CM vs. CMX

Choosing the right Ethernet cable involves more than just speed categories like Cat6 or cat6aThe classification of the roof is crucial for safety and regulatory compliance, especially in installation environments.

CMX (Exterior): Rated for outdoor use; resistant to moisture and sunlight, but not for recessed wall installation.

CM (General Use): Suitable for general use applications such as under carpets or in open spaces, but lacks strict fire safety ratings.

CMR (Rise): Designed for vertical risers between floors. It features fire-resistant covers to prevent the spread of flames between levels.

CMP (Plenum): The highest fire safety rating. Designed for plenum spaces (air circulation areas). CMP covers are low smoke and flame retardant, meeting stringent safety codes.

Always choose a roofing rating that meets local building and fire codes. Using CMP in plenum spaces and CMR on risers ensures both performance and safety.