Very much like copper links, NEC (National Electrical Code) requires indoor fiber optic links be set apart with their fire and smoking appraisals. NEC requires all indoor fiber links be stamped accurately and introduced appropriately for its expected use.
As indicated by NEC, a structure’s inside region is partitioned into three kinds of segments: plenums, risers and broadly useful regions.
:: What is a Plenum region?
A Plenum region is a structure space utilized fiber optic cable china for wind stream or air conveyance framework. In many structures, the region over a drop roof or under a raised floor is utilized as the air return (wellspring of air) for the cooling. Those drop roof and raised floors are additionally where fiber links are regularly introduced. Assuming that those links were consuming, they would emit harmful vapor and the exhaust would be taken care of to the remainder of the structure by the climate control system. Therefore, individuals could be harmed despite the fact that they are far from the fire.
:: What is a Riser region?
A Riser region is a story opening, shaft or channel that runs upward through at least one stories
:: What is General Purpose region?
Any remaining region that isn’t plenum or riser and on a similar floor is a broadly useful region.
:: Fiber Optic Cable Fire and Smoking Rating Markings
OFNP represents Optical Fiber Nonconductive Plenum. OFNP links have imperviousness to fire and low smoke creation qualities. They can be introduced in channels, plenums and different spaces utilized for building wind stream. This is the most elevated fire rating fiber link and no other link types can be utilized as substitutes.
OFCP represents Optical Fiber Conductive Plenum. OFCP links have a similar fire and smoking rating as OFNP links yet they have a leading shield or focal strength part which is normally steel. OFCP links should be appropriately grounded at the two finishes. Subsequently, OFCP links can not be introduced in a similar link plate or conductor as power links.
OFNR represents Optical Fiber Nonconductive Riser. OFNR links are utilized in Riser regions which are building vertical shafts or runs starting with one story then onto the next floor. OFNR links would not be introduced in plenum regions since they be able to don’t have the expected fire and smoking rating as Plenum evaluated links. OFNP plenum links can be utilized alternative for OFNR links.
OFCR represents Optical Fiber Conductive Riser. OFCR links have a similar fire rating qualities as OFNR links yet they have leading covering or focal strength part which is typically steel. OFCR links ought to likewise be appropriately grounded at the two closures. OFCP links can be utilized alternative for OFCR links. OFCR links can not be introduced in similar link plate or channels as power links.
OFNG represents Optical Fiber Nonconductive General-Purpose. They are normally utilized in even cabling, single floor applications. OFNG links can not be utilized in plenums or risers. OFNP and OFNR links both can be utilized alternative for OFNG links.
OFCG represents Optical Fiber Conductive General-Purpose. They have similar fire qualities as OFNG links yet they have directing reinforcement or focal strength individuals which is commonly steel. OFCG links ought to be appropriately grounded at the two finishes. They ought not be introduced in similar link plate or channels as power links.