Communication Cable Ratings In America

- Mar 06, 2018-

The most common ratings used to describe the communications cables in North America are CMX, CM/CMG, CMR and CMP. When you see “C” and “M” used as a cable’s description, it stands for that the cable can be used in accordance with the National Electrical Code (NEC).


CMX is a residential grade cable. Such cables are limited to residential or other small applications where the number of communication cables used is very little.


CM/CMG are the most commonly used for commercial grade communication cable.


CMR cable also called “riser-rated cable”. These cables are used for regular networking from room to room, as long as the cable does not need to pass through an air duct, is constructed to prevent fires from spreading floor to floor in vertical installations.They can be installed anywhere except plenums.


CMP cable also called “plenum-rated cable”. These cables are used if networking must be done in air ducts. They can be used for commercial or residential spaces. They will not combust and cannot actually cause fires. This cable is designed to restrict flame propagation to no more than five feet and to limit the amount of smoke emitted during a fire.


At Biadicable, we got the CM rating and CMR rating for the Cat5e network cable and Cat6 network cable, all with outstanding manufacturing quality! Our experts understand the difference in the cable ratings and can help you select the right cable for your project. For more information, please contact our professional sales via email!