What Does Cm Rated Cable Mean

Cl2 and cl3 cable doesn t reduce smoke or gases but minimize the possibility of shock.

What does cm rated cable mean.

When installing ethernet cable in walls or ceilings you may encounter terms like cm cmr cmp or some others like pvc and lszh. Cm cmg are the most commonly used commercial grade communication cable. In the case of cm the standard outlines general use or use in cases where the fire code does not place any restrictions on cable type. Cmr cable often called riser rated cable is constructed to prevent fires from spreading floor to floor in vertical installations.

They can be installed anywhere except plenums. Do you know what these terms really mean and which one does your project actually need. Often this type of cable meant for home usage will carry an x suffix signifying that it is intended for use in buildings where the cable is enclosed in a non combustible conduit. Among all these terms cm cmr and cmp are the most common ethernet cable ratings specified by the national electric code nec.

A cmr rating means the cable can be used in the risers of commercial buildings because they limit the spread of flames better than cables in the cl cm family. What does cat mean. These are used for regular networking from room to room as long as the cable does not need to pass through an air duct. Cat simply stands for category.

When shopping for cables you may notice they re nearly always classified as cat 5 cat6e or something similar.