The Pros and Cons of Different Plenum Fire Alarm Cable Types

Fire alarm cables are an essential part of any fire alarm system. They transmit signals from fire detectors and other devices to the fire alarm control panel, which then activates the appropriate alarms and emergency procedures. Plenum fire alarm cables are designed to be installed in plenum spaces, which are air-handling spaces that are used to distribute air throughout a building. Plenum cables are required to meet certain fire safety standards, such as the UL 910 standard, which ensures that they will not contribute to the spread of fire or smoke.

There are several different types of plenum fire alarm cables available, each with its own advantages and disadvantages. The most common types of plenum fire alarm cables include:

– CMP (Communications Multipurpose Plenum) Cables: CMP cables are the most common type of plenum fire alarm cable. They are made with a flame-retardant PVC jacket and are designed to meet the UL 910 standard. CMP cables are relatively inexpensive and easy to install, but they are not as flexible as other types of plenum cables.

– CMG (Communications Multipurpose Plenum and General Use) Cables: CMG cables are similar to CMP cables, but they have a more flexible jacket. This makes them easier to install in tight spaces, but it also makes them more expensive than CMP cables.

– CMPX (Communications Multipurpose Plenum Extended) Cables: CMPX cables are a newer type of plenum fire alarm cable that is designed to be even more flexible than CMG cables. They are made with a flame-retardant PVC jacket and a special filler material that makes them more resistant to kinking and bending. CMPX cables are more expensive than CMP and CMG cables, but they offer the best flexibility and performance.

– FT4 (Flame-Tight 4) Cables: FT4 cables are a type of plenum fire alarm cable that is designed to meet the more stringent European fire safety standards. They are made with a flame-retardant PVC jacket and a special filler material that makes them highly resistant to fire and smoke. FT4 cables are more expensive than CMP, CMG, and CMPX cables, but they offer the highest level of fire safety.

Deciding on the Right Cable Type

The type of plenum fire alarm cable that you choose will depend on your specific needs and budget. If you need a cable that is inexpensive and easy to install, CMP cables are a good option. If you need a cable that is more flexible, CMG or CMPX cables are a better choice. And if you need a cable that offers the highest level of fire safety, FT4 cables are the best option.

Regardless of the type of plenum fire alarm cable that you choose, it is important to ensure that it is properly installed and maintained. This will help to ensure that your fire alarm system will work properly in the event of a fire.