1. Pressurized level - CMP level（Plenum Flame Test / Steiner Tunnel Test）
This includes copper (UTP and ScTP) CMP and OFNP or OFCP fiber optic cables, the most pre-requisite Plenum Cable in the UL Fire Protection Standard. The applicable safety standard is UL910. In a bundle of booster grade cables, when the fan is forcibly blown to the flame, the flame on the cable will be extinguished within 5meter of its own, and because such a cable contains chemical substances, it will not be emitted when burned or at extremely high temperatures Toxic smoke or steam In the United States, booster grade cables are the preferred cables, and in communication cabling they are typically installed in air-return booster systems for ventilation ducts or air handling equipment.
2. Mainline - CMR level（Riser Flame Test）
This is a UL standard commercial cable (Riser Cable), the applicable safety standard is UL1666. This includes CMR copper cables as well as OFNR or OFCR fiber optic cables, which are the second most rated cables Bundled trunk cables Flames on the cables must be extinguished within 5 m of the forced air blow of the fans, however, it No smoke or toxic norms. Countries other than the United States usually use this fire rated cable in building trunks and horizontal cables.
3. Commercial - CM level (Vertial Tray Flame Test)
This is the UL standard commercial grade cable (General Purpose Cable), the applicable safety standard is UL1581. This includes CM copper cables as well as OFN or OFC fiber optic cables. Commercial grade cables are lower than the mainline grade, and the flame on the bundled cables must be extinguished within 5meter of the flame without the restriction of forced fan blowing and no smoke or Toxicity specifications Commercial grade cables are commonly used for horizontal routing and are generally bundled together.
4. General level - CMG level (Vertial Tray Flame Test)
This is the UL standard General Purpose Cable (General Purpose Cable), the applicable safety standard is UL1581. This includes CMG copper and OFNG or OFCG fiber optic cables. Cable performance at this level is similar to that of commercial grade.
5. Home level - CMX level (Vertial Wire Flame Test)
This is UL standard Restricted Cable, applicable to UL1581, VW-1. Refers to the CMX copper cable, no fiber classification, is the lowest level of UL fire rating. A flame on the domestic level of the cable, when its spread to 5meter or less must be self-extinguishing, but no smoke or toxicity standards. For home or small office systems where each cable is laid alone, it should not be laid in a bundle because the flame spread over a bundle of cables is quite different from that of a cable.