Cable Fire Ratings: CM, CMR, & CMP

✨ Please consider supporting my channel! ✨ Every bit helps—whether it’s $15, $10, or even $5. You can make a donation via this site: https://www.patreon.com/sunnyclassroom Introduction PVC has properties suitable for making up Ethernet cable jackets, but it also produces toxic smoke and fumes if caught in a fire. However, cable jackets are not made equally. They have three basic fire ratings: CM, CMR, and CMP. CM-rated cables are only for general use: patch cables, or cables installed inside the wall where the fire code is not strict. CMR - rated cables are used between the floors of a multistory building. CMP-rated cables are better than both CM and CMR. They are the most fire-resistant and should be used in plenum spaces where fire can easily start and spread. Playlists: Topology & cabling, & physical cabling structure: https://www.youtube.com/watch?v=T5xQJkAamk&list=PLSNNzog5eydsZCgT6tlX7Zb4EU67_hxyA Ethernet Basics: https://www.youtube.com/watch?v=FkH_JIZbpU&list=PLSNNzog5eydvAxPHJiDybPomC1fFHf1KE IPv4 Basics: https://www.youtube.com/watch?v=vcArZIAmnYQ&list=PLSNNzog5eydt_plAtt3k_LYuIXrAS4aDZ OSI Model and related: https://www.youtube.com/watch?v=nFnLPGk8WjA&list=PLSNNzog5eydtQcezP4OrrLL5preHLLkGA