Connect with Us. Need Help? All Rights Reserved. We're Powered by Infinite Solutions. Code Consultants. Sign Up. Upgrade to Premium. Code calculators: Code Calculators automatically generates a detailed list of requirements. Sign in. Class 2, Class 3, and Type PLTC cables, installed as wiring methods within buildings, shall be listed as resistant to the spread of fire and other criteria in accordance with P Add Comment.
Types CL2P and CL3P plenum cable shall be listed as suitable for use in ducts, plenums , and other space for environmental air and shall be listed as having adequate fire-resistant and low-smoke producing characteristics.
Types CL2R and CL3R riser cables shall be marked as Type CL2R or CL3R, respectively, and be listed as suitable for use in a vertical run in a shaft or from floor to floor and shall be listed as having fire-resistant characteristics capable of preventing the carrying of fire from floor to floor.
Types CL2 and CL3 cables shall be marked as Type CL2 or CL3, respectively, and be listed as suitable for general-purpose use, with the exception of risers, ducts, plenums , and other space used for environmental air, and shall be listed as resistant to the spread of fire. Type PLTC nonmetallic-sheathed, powerlimited tray cable shall be listed as being suitable for cable trays and shall consist of a factory assembly of two or more insulated conductors under a nonmetallic jacket.
The conductor material shall be copper solid or stranded. Insulation on conductors shall be rated for volts. The cable core shall be two or more parallel conductors, one or more group assemblies of twisted or parallel conductors, or a combination thereof. A metallic shield or a metallized foil shield with drain wire s shall be permitted to be applied over the cable core, over groups of conductors, or both. While this effort may save vendors thousands of dollars, it ultimately is the consumer who gets burned in the long run.
With false testing facility markings, how is a buyer really supposed to know what they are buying and if it will adhere to the spec's they need? Suppose one installs a large quantity of suspect network cable and after the installation, the consumer learns that their network is just too slow because the cable was not built with an adequate amount of copper but rather copper coated aluminum.
Now the consumer will have to pay again and again to have the installation removed as well as new quality cable bought and installed. In the cable industry, the selling of falsely labeled cable represents perhaps the largest safety risk to consumers and corporations.
The materials used to construct a cable with a riser or plenum rated jacket cost much more than their in-wall equivalent. As a result, cheap cables are being sold with in-wall rated jackets and labeled as riser rated.
Even worse is cables that would only pass a riser rating test but are sold as plenum just to save a few dollars. Any installer using such cable is gambling with the lives of others should a fire break out in a building wired with incorrectly labeled cable.
The agencies and companies listed below benefit consumers through testing, developing safety standards and certifications. The verification marks of any of these agencies on a product are meant to ensure the consumer that what they are buying will not present an electrical or fire risk under normal and sometimes even extreme usage.
While there are many testing and certification companies, those below represent the most recognized globally. When purchasing for your next wiring project or job always keep in mind that cheap, inferior cable is present in the marketplace.
A buyer should ask questions and even request a cable's data spec sheet to know what they are getting. These numbers can typically be verified upon the respective testing agency's website.
At CableWholesale, we are committed to not only selling tested and verified cable products, but also educating the public to make the right purchase for their next wring project. While cost is always a factor in purchasing a product, it should never come at the expense of safety. Connect With Us. Oh My! What is a Plenum? A Plenum Airspace A plenum is an area used as a return for air conditioning and air circulation systems within buildings.
Plenum Cable This type of cable is specifically designed for use in plenum spaces. Riser Cable Riser cables are designed for use in non-plenum vertical spaces such as between floors in a building. Cutting Corners Cheap but at What Price? Any smoke or fumes that get released into the plenum are pumped all over the rest of the building. If you have ever seen regular plastics burn, you understand why the cables in a plenum need special treatment.
Most plastic burns quickly and lets off plumes of thick dirty toxic black smoke. Unrated cables should never be used in any kind of construction, especially in a plenum. If they catch fire, they can actually spread the fire to other parts of the building. Any cables installed in a plenum space must be plenum rated.
The jacket is designed to 1 hinder the progression of flame and 2 not release the harmful smoke that normally accompanies any type of burning plastic.
We use Teflon or PTFE coated wires in our plenum network cables to make sure that the cables are safe and heat-resistant. Plenum cables are the highest standard and can safely be substituted for any other cable type such as riser, CM, CL2 or CL3 cables.
What is CMP rated Cable? Or CMR rated cable? What do these acronyms mean and why do they matter?
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