Data center cables are intricate, converged, decentralized, and extend to every part of the data center. Therefore, the importance of flame-retardant and fire-resistant fiber optic cables to data centers is self-evident. Because of improper selection, it may cause the fire to spread when the fire occurs, causing the entire data center to burn down, causing huge and irreparable losses. So what is the difference of the CM, CMR and CMP?
What is CL/CM/CMG?
CL/CM/CMG: These cable jackets are suitable for use in all ordinary situations, with CL cables used for audio/visual applications and CM/CMG used for communications applications like Ethernet. They’ve passed what’s called a “vertical tray flame test,” meaning they don’t ordinarily spread flames more than eight feet. You can install these rated-cables in the wall or ceiling, and don’t have to worry about things like risers and plenums in home use.
What is CMR?
The safety level of CMR fire protection ranks second. It mainly achieves the purpose of making it difficult to burn by increasing the ignition point of the cable (about 300 ° C). At present, the outer sheath of CMR-grade cable network cable is made of high flame-retardant PVC material, and the insulation layer is made of high-density PE material. After being exposed to flame, it will emit toxic halogenated gas (chlorine) and lead vapor, and the halogenated gas will quickly The oxygen in the air is consumed to extinguish the flame. CMR-grade cable network cables are widely used in trunk applications where the ventilation system is physically separate from the cabling system, that is, in the vertical trunk subsystem of the room.
What is CMP?
CMP fire-rated grade has the highest safety. It has perfect flame retardant ability and will not emit a large amount of toxic fumes when burning. The outer sheath of CMP grade cable network cable is fluorine material (such as PTFE, PTFE, FEP, fluorinated ethylene propylene), which has high decomposition temperature and high ignition point. Because the CMP cable network uses Teflo-based chemicals, it can prevent combustion from spreading and minimize the emitted smoke and toxins. Even in a fire, the building will not be filled with a large amount of smoke or harmful toxins emitted by the burning of the cable network. Therefore, CMP-grade cable network cables are used in air return pressure boosting systems used in ventilation ducts or air handling equipment.
The differences between CMR and CMP?
CMR cables are also used more for residential homes. These cables are less strict when it comes to fire requirements than CMP cables; CMR cables must pass a vertical burn test to prove that they can self-extinguish. However, because CMR cables have less restrictions, CMP cables are typically more used, since they have to pass more regulations to be usable. However, CMR cables, when they can be used, are more flexible than CMP cables, making them easier to arrange in a room.