Plenum Cable

Cable that is run in the plenum spaces of buildings. In building construction, the plenum (pronounced PLEH-nuhm) is the space that is used for air circulation in heating and air conditioning systems, typically between the structural ceiling and the suspended ceiling or under a raised floor. The plenum space is typically used to house the communication cables for the buildings computer and telephone network(s). However, use of plenum areas for cable storage poses a serious hazard in the event of a fire as once the fire reaches the plenum space there are few barriers to contain the smoke and flames. Plenum cable is coated with a fire-retardant coating (usually Teflon) so that in case of a fire it does not give off toxic gasses and smoke as it burns. Twisted-pair and coaxial versions of cable are made in plenum versions.

Webopedia Staff
Webopedia Staff
Since 1995, more than 100 tech experts and researchers have kept Webopedia’s definitions, articles, and study guides up to date. For more information on current editorial staff, please visit our About page.

Related Articles

Change Order

When changes need to be made to a project after the project has already been approved by the client, a professional service firm needs...

Container Registry Software

Container registry software is designed to store container images while inactive and offers automation features for container management. The software also provides a level...

Systems Integrator (SI)

With the increasing complexity of IT, businesses want complete IT solutions that include the right software, networking, and hardware components. They also want those...

Early Adopter

Early adopters play an integral role in the shift from untested to critical technology—they're the first buyers to invest in new hardware, software, or...

Change Order

When changes need to be made to a project after the project has...

Container Registry Software

Container registry software is designed to store container images while inactive and offers...

Accenture

Accenture is a global professional services company that specializes in information technology (IT)...