Just like copper cables, NEC (Countrywide Electrical Code) calls for indoor fiber optic cables be marked with their fireplace and smoking scores. NEC necessitates all indoor fiber cables be marked correctly and put in correctly for its intended use.
In accordance to NEC, a building’s inside of place is divided into a few varieties of sections: plenums, risers and common function areas.
:: What is a Plenum place?
A Plenum location is a making room applied for air flow or air distribution system. In most structures, the region above a drop ceiling or below a raised floor is made use of as the air return (resource of air) for the air conditioning. These fall ceiling and lifted floors are also in which fiber cables are often set up. If those cables were being burning, they would give off toxic fumes and the fumes would be fed to the relaxation of the developing by the air conditioner. As a outcome, folks could be hurt even nevertheless they are a extensive way from the fire.
:: What is a Riser location?
A Riser place is a floor opening, shaft or duct that operates vertically through one particular or far more flooring
:: What is Typical Reason place?
All other place that is not plenum or riser and on the very same ground is a standard goal region.
:: Fiber Optic Cable Fireplace and Smoking cigarettes Score Markings
OFNP stands for Optical Fiber Nonconductive Plenum. OFNP cables have fireplace-resistance and minimal smoke generation features. They can be put in in ducts, plenums and other areas utilized for setting up airflow. This is the best fire rating fiber cable and no other cable kinds can be made use of as substitutes.
OFCP stands for Optical Fiber Conductive Plenum. OFCP cables have the identical fireplace and smoking ranking as OFNP cables but they have a conducting armor or central power member which is normally metal. OFCP cables must be effectively grounded at equally finishes. As a outcome, OFCP cables can not be installed in the same cable tray or conduit as electricity cables.
OFNR stands for Optical Fiber Nonconductive Riser. OFNR cables are used in Riser regions which are developing vertical shafts or operates from a person ground to a different flooring. OFNR cables can not be mounted in plenum spots given that they do not have the essential fire and smoking cigarettes 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 exact hearth ranking properties as OFNR cables but they have conducting armor or central toughness member which is typically metal. OFCR cables should really also be thoroughly grounded at the two finishes. OFCP cables can be utilized as substitutes for OFCR cables. OFCR cables can not be put in in the similar cable trays or conduits as electric power cables.
OFNG stands for Optical Fiber Nonconductive Standard-Goal. They are ordinarily utilised in horizontal cabling, solitary ground programs. OFNG cables can not be made use of in plenums or risers. OFNP and OFNR cables equally can be utilized as substitutes for OFNG cables.
OFCG stands for Optical Fiber Conductive Basic-Objective. They have the exact same fireplace characteristics as OFNG cables but they have conducting armor or central strength users which is generally steel. OFCG cables really should be appropriately grounded at equally ends. They must not be set up in the similar cable tray or conduits as power cables.