Cable Ratings, CL2, CL3, CM, CMP, CMR, Ethernet Cable, Installation Guide, Speaker Wire, Structured Cabling CL2, CL3, CM, CMR & CMP Cable Ratings: What's the Difference?Learn the differences between CL2, CL3, CM, CMR, and CMP cable ratings, including fire resistance, installation requirements, building code compliance, and common applications for Ethernet cable, speaker wire, and low-voltage... Andrey Bogdanov | June 11, 2026
