When buying Cat6 Ethernet cable, you’ll often see CMR (riser-rated) and CMP (plenum-rated) options. Both support the same network performance, but the difference lies in fire safety ratings.
Cat6 CMR vs. Cat6 CMP
Cat6 CMR Cable
Application: Riser spaces (between floors).
Cost: More affordable than CMP.
Best For: Offices, riser shafts, vertical runs.
Cat6 CMP Cable
Application: Plenum spaces (air ducts, ceilings, raised floors).“For more about why CMP is required in plenum spaces, see our CMP cable guide.”
Cost: Higher price due to strict fire rating.
Best For: Data centers, commercial buildings with plenum spaces.
Key Comparison: Cat6 CMR vs Cat6 CMP
| Feature | Cat6 CMR | Cat6 CMP |
|---|---|---|
| Fire Rating | Riser-rated | Plenum-rated (highest safety) |
| Application | Vertical riser shafts | Plenum spaces (air-handling) |
| Cost | Lower | Higher |
| Compliance | Cannot replace CMP | Can replace CMR and CM |
Conclusion
For most office riser installs, choose Cat6 CMR.
For plenum spaces or mission-critical facilities, always go with Cat6 CMP.
“Need the full picture of all fire ratings? Check our ultimate CM, CMR, and CMP guide.”
