What Is Cable Jacket?
Cable Jacket Rating of Fiber Optic Cable
- Plenums: A plenum area is is used for air flow or air distribution system (ceiling and elevated floor) building space.
- Risers: A riser area is a floor opening, shaft or pipe vertically passing through one or more floors.
- General purpose areas: The general area refers to all other areas on the same floor without pressure ventilation systems or risers.
- CL/CM/CMG: These cable jackets are applicable to all common situations. Specifically, CL cables are used for audio and video applications, and CM/CMG for communication applications, such as Ethernet. They are all tested through the so-called “vertical tray flame test”, which means they usually won’t spread the flame more than eight feet. You can install these rated cables on walls or ceilings without worrying about risers and plenums at home.
- CMR: The CMR rating means that the cables can be used in the risers of commercial buildings because they limit flame spread better than the cables in the CL/CM series. In addition to plenums, they can be installed anywhere.
- CMP: “P” clearly represents the plenum, so in addition to the places where CM and CMR cables can operate, this communication cable can also be used for plenums. The jacket is made of the material that retards the spread of flame. It does not emit a large amount of smoke or poisonous gas when it burns.