3 m (10 ft).
(4) One- and Two-Family Dwellings. Type CATVX cables less than 10 mm (0.375 in.) in diameter shall be permitted to be installed in one- and two-family dwellings.
(5) Multifamily Dwellings. Type CATVX cables less than
10 mm (0.375 in.) in diameter shall be permitted to be
Dwellings CMX BMR, BM BLP, BLR, BL, BLX
(A)-------- >{ B| Coaxial cable A shall be permitted to be used in place of coaxial cable B.
Type BL— Network-powered broadband communications low- power cable
Type BM—Network-powered broadband communications medium- power cable
Type CATV—Community antenna television cables
Type CM—Communications cables
Figure 820.154(E) Cable Substitution Hierarchy.
VI. Listing Requirements
820.179 Coaxial Cables. Cables shall be listed in accor- dance with 820.179(A) through (D) and marked in
accordance with Table 820.179. The cable voltage rating shall not be marked on the cable.
FPN: Voltage markings on cables could be misinterpreted to suggest that the cables may be suitable for Class 1, electric light, and power applications.
Exception: Voltage markings shall be permitted where the cable has multiple listings and voltage marking is required for one or more of the listings.
(A) Type CATVP. Type CATVP community antenna tele vision plenum coaxial cables shall be listed as being suit able for use in ducts, plenums, and other spaces used for environmental air and shall also be listed as having adequate fire-resistant and low smoke-producing characteristics.
FPN: One method of defining a cable that is low smoke- producing cable and fire-resistant cable is that the cable exhibits a maximum peak optical density of 0.5 or less, an average optical density of 0.15 or less, and a maximum flame spread distance of 1.52 m (5 ft) or less when tested in accordance with NFPA 262, Standard Method of Test for Flame Travel and Smoke of Wires and Cables for Use in Air Handling Spaces.
(B) Type CATVR. Type CATVR community antenna tele vision riser coaxial 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
ca
pable of preventing the carrying of fire from floor to
floor.
FPN: 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.
(C) Type CATV. Type CATV community antenna televi sion coaxial cables shall be listed as being suitable for general-purpose CATV use, with the exception of risers and plenums, and shall also be listed as being resistant to the spread of fire.
FPN: 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