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Check your local fire code! PVC jacketed cable is for general purpose use. It cannot be used in air returns unless enclosed in conduit. A plenum rated jacket is generally required for use in any area used for air return, many dropped ceilings, air ducts and in public buildings. Fire codes vary from area to area. If unsure which you need, check with your local Fire Marshall.
Note: The standard CAB-5-M120HYD Cisco cable has a general-purpose PVC jacket. Stonewall offers the option of a plenum rated jacket for applications where fire codes specify a fire resistant jacket (CL2P rated). The standard Cisco cables are 5 and 10 feet in length, but Stonewall builds this cable to any length. For custom exit angles, see product SC-3064-0 listed below.