Optical fiber, nonconductive, riser (OFNR) is a type of

optical fiber cable A fiber-optic cable, also known as an optical-fiber cable, is an assembly similar to an electrical cable, but containing one or more optical fibers that are used to carry light. The optical fiber elements are typically individually coated with ...

. As designated by the

National Fire Protection Association The National Fire Protection Association (NFPA) is an international nonprofit organization devoted to eliminating death, injury, property and economic loss due to fire, electrical and related hazards. As of 2018, the NFPA claims to have 50,000 mem ...

(NFPA), this name is used for interior fiber-optic cables which contain no

electrically conductive Electrical resistivity (also called specific electrical resistance or volume resistivity) is a fundamental property of a material that measures how strongly it resists electric current. A low resistivity indicates a material that readily allows ...

components, and which are certified for use in riser applications; they are

engineer Engineers, as practitioners of engineering, are professionals who invent, design, analyze, build and test machines, complex systems, structures, gadgets and materials to fulfill functional objectives and requirements while considering the l ...

ed to prevent the spread of

fire Fire is the rapid oxidation of a material (the fuel) in the exothermic chemical process of combustion, releasing heat, light, and various reaction Product (chemistry), products. At a certain point in the combustion reaction, called the ignition ...

from

floor A floor is the bottom surface of a room or vehicle. Floors vary from simple dirt in a cave to many layered surfaces made with modern technology. Floors may be stone, wood, bamboo, metal or any other material that can support the expected load ...

to floor in a

building A building, or edifice, is an enclosed structure with a roof and walls standing more or less permanently in one place, such as a house or factory (although there's also portable buildings). Buildings come in a variety of sizes, shapes, and fun ...

. Typically they are tested for compliance with ANSI/UL 1666–1997, ''Standard Test for Flame Propagation Height of Electrical and Optical-Fiber Cable Installed Vertically in Shafts''. NFPA NEC 2005 Art 770.51(B) FPN. They are distinct from optical fiber, nonconductive,

plenum cable __NOTOC__ Plenum cable is electrical cable that is laid in the plenum spaces of buildings. In the United States, plastics used in the construction of plenum cable are regulated under the National Fire Protection Association standard NFPA 90A: Stan ...

(OFNP), and general-purpose optical cable.

Related abbreviations

Underwriters Laboratories The UL enterprise is a global safety science company headquartered in Northbrook, Illinois, composed of three organizations, UL Research Institutes, UL Standards & Engagement and UL Solutions. Established in 1894, the UL enterprise was founded a ...

defines the following related abbreviations: *OFC: Optical fiber, conductive *OFN: Optical fiber, nonconductive *OFCG: Optical fiber, conductive, general use *OFNG: Optical fiber, nonconductive, general use *OFCP: Optical fiber, conductive, plenum *OFNP: Optical fiber, nonconductive, plenum *OFCR: Optical fiber, conductive, riser *OFNR: Optical fiber, nonconductive, riser

References

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