Carlon Structured Cable Management Systems Handbook - Low Res User Manual

Page 47

III. CABLES WITHIN BUILDINGS

770.49 Fire Resistance of Optical Fiber Cables.
Optical fiber cables installed as wiring within buildings
shall be listed as being resistant to the spread of fire in
accordance with Sections 770.50 and 770.51.

770.51 Listing Requirements for Optical Fiber
Cables and Raceways. Optical fiber cables shall be
listed in accordance with 770.51(A) through 770.51(D),
and optical fiber raceways shall be listed in accordance
with 770.51(E) through (G).

(A) Types OFNP and OFCP. Types OFNP and OFCP
nonconductive and conductive optical fiber plenum
cables shall be listed as being suitable for use in ducts,
plenums, and other space used for environmental
air and shall also be listed as having adequate fire-
resistant and low smoke-producing characteristics.

FPN: One method of defining low smoke-producing
cables is by establishing an acceptable value of the
smoke produced when tested in accordance with
NFPA 262-1999, Standard Method of Test for Flame
Travel and Smoke of Wires and Cables for Use in Air-
Handling Spaces, to a maximum peak optical density
of 0.5 and a maximum average optical density of
0.15. Similarly, one method of defining fire-resistant
cables is by defining maximum allowable flame
travel distance of 1.52 m (5 ft) when tested in
accordance with the same test.

(B) Types OFNR and OFCR. Types OFNR and OFCR
nonconductive and conductive optical fiber riser cables
shall be listed as being suitable for use in a vertical
run in a shaft or from floor to floor and shall also be
listed as having fire-resistant characteristics capable
of preventing the carrying of fire from floor to floor.

FPN: One method of defining fire-resistant character-
istics capable of preventing the carrying of fire from
floor to floor is that the cables pass the requirements
of the ANSI/UL 1666-1997 Standard Test for Flame
Propagation Height of Electrical and Optical-Fiber
Cable Installed Vertically in Shafts.

(C) Types OFNG and OFCG. Types OFNG and OFCG
nonconductive and conductive general-purpose optical

Gross Automation (877) 268-3700 · www.carlonsales.com · [email protected]