What is CMR Ethernet cable?
CMR cable stands for “Communications Multipurpose Cable, Riser”. It is a cable jacket fire resistance rating defined in Article 800 of the NEC. CMR cable is also referred to as “riser-rated cable” and designed to prevent fires from spreading between floors through risers or vertical shafts.
What is a CMR rating?
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. They can be installed anywhere except plenums. CL2R and CL3R are the riser versions of CL2 and CL3, meant to carry higher voltages.
Do I need CMR cable?
CMP cables are plenum cables; these cables are used if networking must be done in air ducts. They can be used for commercial or residential spaces. They will not combust and cannot actually cause fires. CMR cables are riser cables….
| Rating | Usage |
|---|---|
| CMR,CL3R, CL2R | All in-wall and riser applications; not permitted in plenums. |
What is the difference between CM and CMR cable?
Stranded cm cables give them greater flexibility for the purpose of connecting short runs to your personal computer to server racks. CMR cables, the R standing for riser, is more flame-resistant. These ones are more used to riser applications, hence the name, and are less used for patch cables.
Is CMR cable shielded?
Security Alarm – CMR Riser Rated Shielded Bare copper conductors, PVC insulation, Shielded tape with drain wire, Gray PVC jacket. Sequential footage marking. Shielded version has an aluminum tape and drain shielding.
Is CMR cable outdoor rated?
Cablek’s Category 5e CMR/CMX – Outdoor cable is designed for residential indoor/outdoor LAN applications. Outdoor CAT5e Cable – Gray CMX Rated PVC Cable is the ideal voice, data, video and security communications medium for network installations.
How do I know if my Ethernet cable is outdoor rated?
Exterior rated Ethernet cables are waterproof and have a UV resistant jacket designed to withstand sunlight, snow and ice. Direct burial rated cables can be buried in the ground without conduit. The primary jacket type you’ll need for any outdoor installation is CMX rated.
Does Ethernet cable need to be in Wall Rated?
At some point, you may need to run the cable in the ceiling or wall. Make sure the cable doesn’t touch the ceiling tiles and do not run the cable over electrical conduit, water pipes, or any other pipes, as it is unsafe and may not pass inspection. Do not run any data cable beneath the floor.
Can CMX cable be used indoors?
For residential single family and duplex dwellings, CMX Ethernet cable is permitted to be used as indoor/outdoor cable without restriction with the caveat that it cannot exceed 0.25” thickness (OD or outer diameter).
What type of Ethernet cable is best for outside?
Cat6 Shielded Cable
Cat6 Shielded Cable is typically best for outdoor networking. This outdoor ethernet cable is best when placed underground. Most ethernet cable is laid indoors, but there are occasions where you will need your network to traverse outside areas, such as: Connecting two or more external buildings.
Can CMR cable be used outdoors?
CMP cable meets all the requirements for CMR cable and can therefore be used in risers, but CMR cable can’t be installed in the plenum spaces. This designation simply means that the cable has been engineered to be buried without any kind of outside protection.