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Riser rated cable.

Also written CMR cable, OFNR cable, vertical shaft cable.

What is riser rated cable?

Riser rated cable is built for the vertical shafts that carry cabling between floors, where a fire could climb the shaft. The CMR and OFNR ratings mean the jacket will not carry flame from one floor to the next in the test. It sits one step below plenum rated, and it is the ordinary grade for backbone runs in North American specifications.

Defined by NFPA 70, whose article 800 defines the CMR and OFNR riser ratings, published by NFPA.

Ultra Low Loss (ULL) LazrSPEED 550 WideBand LC/UPC to Unconnectorized, Fiber Pigtail, 0.9 mm Riser - SBJ, a Riser rated cable part supplied by Data Systems
Riser rated cable in the catalogue: Ultra Low Loss (ULL) LazrSPEED 550 WideBand LC/UPC to Unconnectorized, Fiber Pigtail, 0.9 mm Riser - SBJ, UBVLCUC11. Catalogue photograph.

Published by Data Systems, network material suppliers in Secunderabad, Hyderabad since 1984, which is 42 years of experience with these parts. Written from the standards named above. Last checked 2026-08-19. How we check this, and what we got wrong.

Data Systems, a network material supplier in Secunderabad, Hyderabad since 1984 with branches in Vijayawada and Visakhapatnam, supplies Riser rated cable across India through official channels. Send a list, get one quote.

Cat6 Bulk Cable

Copper Patch Cord

Fibre Patch Cord

Fibre Pigtail

Where it is used

Related terms

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