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Plenum Cable: Advantages and Disadvantages

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This page outlines the advantages and disadvantages of Plenum cable. It details the benefits and drawbacks associated with using Plenum cables.

What is Plenum Cable? - An Introduction

  • Plenum (CMP) rated cable complies with NFPA-262 and UL-910 standards. The term “plenum” refers to airspace used for air circulation by HVAC systems, such as raised floors or drop ceilings.
  • These cables are designed with jackets made of materials that emit low amounts of smoke. Furthermore, they slow down the spread of flames.
  • A common jacket material is Fluorinated Ethylene Polymer (FEP), which is a softer and more pliable version of Teflon ® (also known as PTFE).

Plenum cable

  • It’s the only type of cable permitted in spaces defined as air plenums, like raised flooring systems and air handling ducts.
  • Plenum cables must self-extinguish and not re-ignite if exposed to flame.
  • OFNP (Optical Fiber Non-conductive Plenum) cables are similar to OFNR cables, but they utilize a jacket suitable for plenum airspaces.

Benefits or Advantages of Plenum Cable

Here are the benefits of using Plenum cable:

  • Fire Resistance: Plenum cables offer fire-resistant properties and produce low smoke emissions when burning.
  • Flame Retardant: They slow down the spread of flames, as they are designed to be self-extinguishing.
  • Space Efficiency: They can be installed in tight spaces, allowing for optimal air circulation for HVAC systems.
  • Versatility: Twisted-pair, coaxial, HDMI, and DVI versions of cables are available in plenum-rated options.

Drawbacks or Disadvantages of Plenum Cable

Here are the drawbacks to consider when using Plenum cable:

  • Cost: They are more expensive compared to non-plenum cables.