Just like copper cables, NEC (Countrywide Electrical Code) demands indoor fiber optic cables be marked with their fire and smoking cigarettes ratings. NEC requires all indoor fiber cables be marked properly and put in thoroughly for its supposed use.
In accordance to NEC, a building’s inside of space is divided into three types of sections: plenums, risers and common intent areas.
:: What is a Plenum area?
A Plenum location is a constructing place employed for air circulation or air distribution process. In most buildings, the location over a fall ceiling or underneath a lifted ground is made use of as the air return (resource of air) for the air conditioning. People fall ceiling and lifted flooring are also wherever fiber cables are normally mounted. If these cables were being burning, they would give off harmful fumes and the fumes would be fed to the rest of the building by the air conditioner. As a final result, individuals could be injured even nevertheless they are a very long way from the fireplace.
:: What is a Riser spot?
A Riser area is a floor opening, shaft or duct that runs vertically via just one or additional floors
:: What is Basic Goal area?
All other location that is not plenum or riser and on the identical ground is a basic goal spot.
:: Fiber Optic Cable Fire and Cigarette smoking Score Markings
OFNP stands for Optical Fiber Nonconductive Plenum. OFNP cables have hearth-resistance and reduced smoke production features. They can be set up in ducts, plenums and other areas used for constructing airflow. This is the best fireplace score fiber cable and no other cable sorts can be made use of as substitutes.
OFCP stands for Optical Fiber Conductive Plenum. OFCP cables have the similar fireplace and smoking score as OFNP cables but they have a conducting armor or central energy member which is typically metal. OFCP cables must be effectively grounded at the two ends. As a outcome, OFCP cables can not be mounted in the exact cable tray or conduit as ability cables.
OFNR stands for Optical Fiber Nonconductive Riser. OFNR cables are made use of in Riser locations which are developing vertical shafts or runs from a single flooring to another ground. OFNR cables can not be set up in plenum locations given that they do not have the needed fireplace and using tobacco ranking as Plenum rated cables. OFNP plenum cables can be made use of as substitutes for OFNR cables.
OFCR stands for Optical Fiber Conductive Riser. OFCR cables have the similar fireplace rating traits as OFNR cables but they have conducting armor or central power member which is typically steel. OFCR cables need to also be thoroughly grounded at equally finishes. OFCP cables can be used as substitutes for OFCR cables. OFCR cables can not be set up in the exact cable trays or conduits as ability cables.
OFNG stands for Optical Fiber Nonconductive General-Purpose. They are usually employed in horizontal cabling, solitary ground apps. OFNG cables can not be employed in plenums or risers. OFNP and OFNR cables both can be applied as substitutes for OFNG cables.
OFCG stands for Optical Fiber Conductive Typical-Goal. They have the similar fireplace qualities as OFNG cables but they have conducting armor or central energy customers which is typically metal. OFCG cables should really be appropriately grounded at both ends. They should not be mounted in the very same cable tray or conduits as power cables.