A plenum cable can simply be referred to an electrical cable that is rated to be run in plenum spaces of buildings. Generally, this sort of space lies in between floors of a given building. Before, any knowledge of a plenum cable, it is contextual to know as to what is a plenum space and why does it require a particular sort of cable to be installed in them.
A plenum space homes air circulations for different ventilation, cooling, and heating systems. Due to the constant air circulations, there is high oxygen content present in such a space making it highly sensitive to fire hazards. The space can readily catch fire, and that is where the plenum cables come into play. A plenum cable is a special sort of cable that is jacketed and coated with fire-retardant materials. The fire ratings on such a cable, are thoroughly tested. The jacket is designed usually with Teflon, so that it does not burn off with smoke and injurious fumes in an event of fire. Therefore, a plenum cable is recommended for a plenum space.
What is Cat6 Plenum Cable?
A Category 6 plenum cable is a Communications Multipurpose Cable, Plenum i.e. it is a CMP rated cable that is tested for category 6 specifications. It is cable that has a special jacket that caters for strict fire ratings. Generally, there are two sorts of cables that are used to repel flame progression fire-sensitive applications. In accordance with the relevant standards in the United States, such cables are Underwriters Laboratories (UL) cables made of polyvinyl chloride, and according to European standards, such cables are Low Smoke Zero Halogen cables (LSZH cables).
The Cat6 plenum cable is a UL listed cable which essentially means that it complies with UL190 safety fire standard. Therefore, this particular sort of cable is designed in such a way, that it restricts flame progression to no more than five feet, and unlike when a regular plastic burns, the Cat6 plenum cable does not burn off with fumes and smoke. In addition to the features of a plenum jacket, the Cat6 plenum cable carries specifications relevant to a Cat6 cable.
Types of Plenum Cable
Typically, one can find plenum cables of different categories. That is because, when you say ‘plenum cable’ that means a cable that is jacketed with certain fire-retardant materials and coatings and is rated to be installed in plenum space.
As of market practice these days, plenum cables are usually found in form of category 5 enhanced (Cat5e), category 6 (Cat6) and category 6 augmented (Cat6a). These cables are usually sold in bulks of 1000ft. A Cat6a plenum cable is the most expensive combination out of the aforesaid, followed by the Cat6 plenum cable, and then the Cat5e plenum cable. The sequence is so because of the high specifications and prominent features of a Cat6a cable, followed by that of Cat6 cable and Cat5e cable. These cables are often sold with 23AWG to 26AWG pure copper conductors or copper-clad aluminum conductors. These cables are incorporated with twisted pair design which is a market standard, and it is quite useful when it comes to cross talks and other electromagnetic interferences.
Where We Can Use Cat6 Plenum Cable?
A Category 6 cable can be used for 10BASE-T (Ethernet), 100BASE-TX (Fast Ethernet) 1000BASE-T (Gigabit Ethernet GbE) and 10BASE-T (10-Gigabit Ethernet). However, when it comes to applications that are specific to a cable with plenum-rated jacket, you first need to determine whether a structure or a building uses plenum air return. To determine that, you need to look at several things, for the purpose, an expert can visit your space and let you know. Nonetheless, it is recommended that when a building is constructed, an addition space for plenum cables, is reserved. Apart from that, plenum cables are recommended to be used in computer rooms or IT centers, for in such spaces, the design is usually a raised flooring system to accommodate the servers. The raised flooring system means that cooling can take place from floor to floor in between several servers, routers, and switches stationed. Air circulates for the purpose of cooling, and that is why plenum cables are recommended.