You are watching: What is the difference between plenum and riser cable
Terms To understand When Considering the Two
When delving into the civilization of low-voltage cables, you’re bound to run right into a slew the acronyms. This is a perform of usual cabling terms. You’ll uncover terms for cables the are ideal for plenum and also riser spaces and also features that help keep network settings safe.CL/CM/CMG Cables: If you’re investing in wires with this terminology, know they aren’t perfect for commercial usage in riser or plenum networks. They’re for residential-grade or general-purpose cabling.CMR Cables: CMR was standing for interactions riser, i m sorry is approved for riser areas.CMP Cables: CMP was standing for communications plenum. They space approved because that both riser and plenum spaces.NFPA: The nationwide Fire protection Association (NFPA) created the National electric Code and holds various industries accountable for fire safety standards.NEC: The National electrical Code, additionally known together NFPA 70, was developed to ensure electrical safety in commercial, residential, and also industrial buildings.
If one application calls for installation in ~ a vertical riser or is designated for an area that’s particularly a non-plenum environment, you’ll use riser cables (CMR). An example of one appliance that uses riser cabling would certainly be her HVAC system.
Many HVACs usage ducted-return configuration, as separate ducts are offered to recirculate air come the system rather of making use of the entire an are above the fall ceiling. This curtails the possibilities of smoke and fumes dispersing through the HVAC system and also damaging cables.
Plenum cabling, or CMP, uses polyvinyl chloride (PVC) or fluorinated ethylene polymer (FEP) because that its jackets’ composition. They’re highly durable and fire resistant, create fewer toxicity fumes than other plastic polymers.
While you deserve to substitute plenum cables for riser cables in a riser-designated space, you can’t replace plenum-rated cables for riser-rated cables in a plenum-designated space.
The key Difference
Juxtaposing the differences in between riser and plenum cable, you’ll find that the standout difference is the fire resistance of their jackets. Since plenum jackets are produced with a better fire resistance, they promote a reduced risk because that an electrical fire 보다 riser cables, therefore more expensive. However, riser cables space still the safer alternative over general-purpose wires.
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