What is it
The term PLENUM refers to the area set aside for air circulation of a heating or air conditioning system. As wire and cable are often installed in the air handling spaces, the industry has adopted the term to refer to wire that is made of specialized materials that have low smoke and low flame characteristics.
The term CATEGORY CABLE refer to cable that is primarily used to connect computer networks and phone equipment within an office building or residence. It can also be used in data centers and for video equipment.
When should it be used
The simple answer is that if your local building code calls for Plenum rated Category Cable it should be installed. Outside of building codes, if there is any concern about combustibility then Plenum Category Cable is the way to go.
Where is it installed
If you are installing cable in any air handling space Plenum Category Cable is the safe choice. Air handling spaces include above a drop ceiling and below a raised floor or riser.
Why should you install it
It is safer. In the event that a fire occurs, PLENUM will burn at a lower & slower rate. Although the increased cost of the raw materials do make the price of Plenum Category Cable higher than alternative materials, the increased safety features make it worth the investment.
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