Network cable UL , CM, CMR, CMP, UL444, Network cable UL, Network cable UL444 authentication agent  

  Network communication line reference standard: UL444    TIA/EIA   568   A/B 

  Network line general model agent: CMX,   CM,   CMR,   CMG,   CMH,   CMP

  Network line CAT type number proxy: CAT   3,   4   ,   5   ,   5E,   6,   Eg.

 

Difference and detection method between flame retardant level CMX/CM/CMR/CMP

 

UL Flame retardant Standard  

Any cable listed by UL that has been tested and verified to meet a certain fire rating may be stamped with the UL identification, fire rating, and approval number.

 

1   Booster stage -CMP stage (supply air combustion Test/Steiner TunnelTest Plenum Flame Test/Steiner TunnelTest)  

This is the most demanding Cable in the UL fire protection standard (Plenum Cable), the applicable safety standard is UL910, the test stipulates that a number of samples are laid on the horizontal air duct of the device, burning with 87.9KW gas Bunsen burner (300,000 BTU/Hr) for 20 minutes. The qualification criteria is that the flame must not extend beyond 5 feet from the front of the Bunsen burner flame. The maximum peak optical density is 0.5, and the maximum average optical density is 0.15.  

This CMP cable is usually installed in air return pressurization systems used in ventilation ducts or air handling equipment and is approved for use in Canada and the United States. The flame retardant performance of FEP/PLENUM material conforming to UL910 standard is better than that of low smoke halogen-free material conforming to IEC60332-1 and IEC60332-3 standard, and the smoke concentration is low when burning.

 

2   Main line Class -CMR class (Riser Flame Test)  

This is a UL standard commercial grade Cable (Riser Cable), applicable to the safety standard UL1666. The experiment required laying several samples on a simulated vertical shaft and using a prescribed 154.5KW gas Bunsen burner (527,500 BTU/Hr) for 30 minutes. The eligibility criteria is that the flame does not spread to the upper part of the 12-foot high room. Trunk level cables do not have smoke concentration specifications, and are generally used for vertical and horizontal floor wiring.

 

3   Commercial grade -CM grade (Vertial Tray Flame Test)  

This is UL standard commercial grade Cable (General Purpose Cable), applicable to the safety standard UL1581. The test required multiple samples to be mounted on a vertical 8-foot stand and burned for 20 minutes with a prescribed 20KW strip burner (70,000 BTU/Hr). The qualification criterion is that the flame cannot spread to the upper end of the cable and extinguish itself. UL1581 and IEC60332-3C are similar, only the number of cables laid is different. Commercial grade cables do not have smoke concentration specifications, generally only applied to the horizontal wiring of the same floor, not applied to the vertical wiring of the floor.

 

4   General grade -CMG grade (Vertial Tray Flame Test)  

This is a General Purpose Cable in the UL standard, and the applicable safety standard is UL1581. Commercial grade and general grade test conditions are similar, both Canada and the United States approved for use. General grade cables do not have smoke concentration specifications, generally only applied to the horizontal wiring of the same floor, not applied to the vertical wiring of the floor.

 

5   Home Grade - CMX grade (Vertial Wire Flame Test)  

This is a Restricted Cable for home use in UL standards, applicable to safety standards UL1581, VW-1. The test requires the specimen to remain vertical, burn (30,000 TU/Hr) with the test burner for 15 seconds, then stop for 15 seconds, and repeat five times. The qualification criteria are that the residual flame should not exceed 60 seconds, the sample should not burn more than 25%, and the surgical cotton pad at the bottom should not be ignited by falling objects. UL1581-VW-1 is similar to IEC60332-1, only the combustion time is different. This grade also has no smoke or toxicity specifications and is only used in home or small office systems where a single cable is laid. Such cables should not be laid in bundles and must be bushed.