When should I use a Plenum Cable?
Written By Tyler
If you are like me you probably always wonder if you are buying the right cable for the job. Did you know that if you plan on having network cables run in a plenum rated ceiling that you need a specific network cable called Cat5e Plenum (also found in Cat6)? If you plan on running HDMI cable across the ceiling then you will need a Plenum HDMI cable. According to the NFPA 262 and outlined in the NFPA 90A the wiring has to meet fire safety standards.
Since these cables are used in air circulation spaces, plenum cables are coated in a flame retardant to meet the fire safety standards. The materials making up the insulation on the wires and jacket on the cable must be capable of withstanding a specified amount of heat for a specified amount of time without combustion or contributing significantly to the sustenance of a fire. In case of an event causing the wiring to begin to burn it will not produce harmful fumes.
The majority of the houses built in the United States are not plenum rated ceilings. If you are still unsure if your project requires buying plenum cables, please check with your local inspector or builder before starting any installation.
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