Much like copper cables, NEC (National Electrical Code) demands indoor fiber optic wires be noted with their fire and smoking rankings. NEC demands SZ Stranding Line be noted correctly and installed properly for its designed use.
In accordance with NEC, a building’s within area is divided into 3 types of sections: plenums, risers and general objective locations.
:: Exactly what is a Plenum region?
A Plenum region is actually a building room utilized for ventilation or air syndication system. Generally in most structures, the region previously mentioned a drop ceiling or within a elevated flooring can be used because the air come back (way to obtain atmosphere) for your air conditioning. These decrease roof and raised floors will also be where fiber cables are often installed. If these wires were burning up, they might emit toxic gases and the gases will be provided to the rest of the building from the air conditioning unit. Because of this, people may be injured while they are quite a distance through the fire.
:: What exactly is a Riser area?
A Riser area is actually a floor opening, shaft or duct that operates up and down via one or more flooring
:: What exactly is Basic Objective area?
All other region that is certainly not plenum or riser and on a single flooring is a general purpose region.
:: fiber Optic Cable Flame and Smoking Ranking Markings
OFNP is short for Visual fiber Nonconductive Plenum. OFNP wires have flame-level of resistance and reduced smoke production qualities. They may be placed in tubes, plenums along with other areas used for developing airflow. This is actually the greatest flame rating fiber cable without any other cable kinds can be used substitutes.
OFCP stands for Optical fiber Conductive Plenum. OFCP wires have the same fire and cigarette smoking rating as SZ Stranding Line but they have a conducting armour or main power fellow member which can be usually metal. OFCP wires must be properly grounded at each finishes. Because of this, OFCP wires cannot be placed in the identical cable holder or conduit as power cables.
OFNR stands for Visual fiber Nonconductive Riser. OFNR cables are used in Riser locations that are developing straight shafts or operates from one flooring to a different flooring. OFNR cables are unable to be set up in plenum locations since they do not have the required flame and smoking ranking as Plenum rated wires. OFNP plenum wires can be used as alternatives for OFNR cables.
OFCR is short for Visual fiber Conductive Riser. OFCR cables have a similar flame rating characteristics as OFNR cables however they have conducting armor or central power fellow member which can be usually steel. OFCR wires should also be properly grounded at each finishes. OFCP cables bring substitutes for OFCR wires. OFCR cables cannot be set up in the identical cable containers or conduits as power cables.
OFNG is short for Optical fiber Nonconductive Basic-Objective. They may be typically found in side to side wiring, solitary floor programs. OFNG wires can not be used in plenums or risers. OFNP and OFNR cables both can be used as alternatives for Optical Fiber Proof-Testing Machine.
OFCG is short for Optical fiber Conductive General-Purpose. They have the same flame characteristics as OFNG wires but they have performing armor or main power associates which can be typically steel. OFCG wires lvmwml be correctly grounded at each ends. They really should not be set up in the same cable tray or conduits as energy cables.