I was wonderring why CAT6 cable price is so much different and looked into it.
There's a few variations.
CCA: Copper Clad Aluminium.
I think I should avoid CCA cable.
Then, there are ratings as below. I'm rewiring a room where I have to bring cat6 cables from computer room to the room over ceiling where there's a 2 feet space between concrete root ceiling and the drop down ceiling board. So, I guess I have to use CMP cables. But is cabling regulated law by cities or recommendation?
UL - The National Electrical Code (NEC), published by the National Fire Protection Association (NFPA), details advisory safety considerations for electrical wiring. NEC Article 800 Communications Cables are manufactured to meet these different cable types. Most network cables have some sort of basic UL rating.
CMP (R-733, R-753) - The 'P' in CMP is for Plenum. Cables meeting type CMP requirements are suitable for installation in ducts and plenums without the use of conduit. These cables are designed for fire resistance and low-smoke and toxin producing characteristics. The 'P' in CMP is for Plenum.
CMR (R-731, R-751, R-756) - The 'R' in CRM is for 'Riser'. Riser type cables are engineered to prevent the spread of fire from floor to floor and are suitable for vertical shaft applications.
CM (R-732, R-752, R-757) - These are cables for general building wiring. CM cables are used in areas other than plenums and risers. These cables are resistant to the spread of fire and pass the UL 1581 Vertical Tray Flame Test.