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Optical fiber, nonconductive, riser (OFNR) is a type of optical fiber cable. As designated by the National Fire Protection Association (NFPA), this name is used for interior fiber-optic cables which contain no electrically conductive components, and which are certified for use in riser applications; they are engineered to prevent the spread of fire from floor to floor in a building. 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 (OFNP), and general-purpose optical cable. ==Related abbreviations== Underwriters Laboratories 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 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Optical fiber, nonconductive, riser」の詳細全文を読む スポンサード リンク
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