barrier or listed divider.

(B) With Other Conductors. Optical fibers shall be per mitted in the same cable, and conductive and nonconductive optical fiber cables shall be permitted in the same cable tray, enclosure, or raceway with conductors of any of the following:

(1) Class 2 and Class 3 remote-control, signaling, and power-limited circuits in compliance with Article

725

(2) Power-limited fire alarm systems in compliance with

Article 760

(3) Communications circuits in compliance with Article

800

(4) Community antenna television and radio distribution systems in compliance with Article 820

(5) Low-power network-powered broadband communications circuits in compliance with Article

830

(C) Support of Cables. Raceways shall be used for their intended purpose. Optical fiber cables shall not be strapped, taped, or attached by any means to the exterior of any conduit or raceway as a means of support.

Exception: Overhead (aerial) spans of optical fiber cables shall be permitted to be attached to the exterior of a raceway-type mast intended for the attachment and support of such cables.

770.154 Applications of Listed Optical Fiber Cables and Raceways. Nonconductive and conductive optical fiber cables shall comply with any of the requirements given in 770.154(A) through (D) and 770.154(F), or where cable substitutions are made as shown in 770.154(E).

(A) Plenums. Cables installed in ducts, plenums, and other spaces used for environmental air shall be Type OFNP or OFCP. Abandoned cables shall not be permitted to remain. Types OFNR, OFCR, OFNG, OFN, OFCG, and OFC cables installed in compliance with

300.22 shall be permitted. Listed plenum optical fiber
raceways shall be permitted to be installed in ducts and plenums as described in 300.22(B) and in other spaces used for environmental air as described in 300.22(C). Only Type OFNP and OFCP cables shall be permitted to be installed in these raceways.

(B) Riser. Cables installed in risers shall be as described in any of (B)(1), (B)(2), or (B)(3).

OFNG, OFN OFNP, OFNR

OFCG, OFC OFNP, OFCP, OFNR, OFCR, OFNG, OFN

Nonconductive Conductive

Plenum

(1) Cables in Vertical Runs. Cables installed in vertical runs and penetrating more than one floor, or cables installed in vertical runs in a shaft, shall be Type OFNR or OFCR. Floor penetrations requiring Type OFNR or OFCR shall contain only cables suitable for riser or plenum use. Listed riser optical fiber raceways and listed plenum optical fiber raceways shall also be permitted to be installed in vertical riser runs in a shaft from floor to floor. Only Type OFNP, OFCP, OFNR, and OFCR cables shall be permitted to be installed in these raceways.

(2) Metal Raceways or Fireproof Shafts. Type OFNG, OFN, OFCG, and OFC cables shall be permitted to be encased in a metal raceway or located in a fireproof shaft having firestops at each floor.

(3) One- and Two-Family Dwellings. Type OFNG, OFN, OFCG, and OFC cables shall be permitted in one- and two-family dwellings.

FPN: See 300.21 for firestop requirements for floor penetrations.

(C) Other Cabling Within Buildings. Cables installed in building locations other than the locations covered in

770.154(A) and (B) shall be Type OFNG, OFN,