outdoor use shall be listed as suitable for the application. Cables shall be marked in accordance with

310.11. Type BMU cables shall be jacketed and listed as
being suitable for outdoor underground use. Type BM
cables shall be listed as being suitable for general-
purpose use, with the exception of risers and plenums,
and shall also be listed as being resistant to the spread of
fire. Type BMR 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 No. 1: One method of defining resistant to the spread of fire is that the cables do not spread fire to the top of the tray in the "UL Flame Exposure, Vertical Tray Flame Test" in UL 1685-2000, Standard for Safety for Vertical-Tray Fire-Propagation and Smoke-Release Test for Electrical and Optical-Fiber Cables. The smoke measurements in the test method are not applicable.
Another method of defining resistant to the spread of fire is for the damage (char length) not to exceed 1.5 m (4 ft 11 in.) when performing the CSA "Vertical Flame Test — Cables in Cable Trays," as described in CSA C22.2 No.
0.3-M-2001, Test Methods for Electrical Wires and

Cables.

FPN No. 2: One method of defining fire-resistant characteristics capable of preventing the carrying of fire from floor to floor is that the cables pass the requirements of ANSI/UL 1666-2002, Standard Test for Flame Propagation Height of Electrical and Optical-Fiber Cable Installed Vertically in Shafts.

(2) Types BLU, BLX, BL, BLR, and BLP Cables.

Network-powered broadband communications low- power underground cable, Type BLU; limited-use network-powered broadband communications low- power cable, Type BLX; network-powered broadband communications low-power cable, Type BL; network- powered broadband communications low-power riser
cable, Type BLR; and network-powered broadband communications low-power plenum cable, Type BLP, shall be factory-assembled cables consisting of a jacketed coaxial cable, a jacketed combination of coaxial cable and multiple individual conductors, or a jacketed combination of an optical fiber cable and mul- tiple individual conductors. The insulation for the indi- vidual conductors shall be rated for 300 volts minimum. Cables intended for outdoor use shall be listed as suitable for the application. Cables shall be marked in accordance with 310.11. Type BLU cables shall be jacketed and listed as being suitable for outdoor underground use. Type BLX limited-use cables shall be listed as being suitable for use outside, for use in dwellings, and for use in raceways and shall also be listed as being resistant to flame spread. Type BL cables shall be listed as being suitable for general-purpose use, with the exception of risers and plenums, and shall also be listed as being resistant to the spread of fire. Type BLR 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.