Optical Fiber Nonconductive Riser (OFNR)

A type of Fiber optic Cable used in vertical shafts or in runs between floors; must have fire-resistant characteristics capable of preventing the spread of fire from floor-to-floor. OFNR is the designation given by the National Fire Protection Association (NFPA) to interior Fiber Optic Cable which contain no electricall conductive component and which are certified for user in Riser applications.

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