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.
(I) Plenum Signaling Raceways. Plenum signaling race- ways shall be listed as having adequate fire-resistant and low smoke-producing characteristics.
(J) Riser Signaling Raceways. Riser signaling raceways shall be listed as having adequate fire-resistant characteristics capable 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 raceways pass the requirements of the Test for Flame Propagation (Riser) in UL 2024, Standard for Optical Fiber Cable Raceway.
(K) General-Purpose Signaling Raceways. General- purpose signaling raceways shall be listed as being resistant to the spread of fire.
FPN: One method of defining resistance to the spread of fire is that the raceways pass the requirements of the Vertical-Tray Flame Test (General use) in UL 2024, Standard for Optical Fiber Cable Raceway.
(L) Marking. Cables shall be marked in accordance with
310.11(A)(2), (A)(3), (A)(4), and (A)(5) and Table
725.179. Voltage ratings shall not be marked on the
cables.
FPN: Voltage markings on cables may 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 a voltage marking is required for one or more of the listings.
Table 725.179 Cable Marking
Cable Marking Type
CL3P Class 3 plenum cable CL2P Class 2 plenum cable CL3R Class 3 riser cable CL2R Class 2 riser cable
PLTC Power-limited tray cable
CL3 Class 3 cable
CL2 Class 2 cable
CL3X Class 3 cable, limited use
CL2X Class 2 cable, limited use
FPN: Class 2 and Class 3 cable types are listed in descending order of fire resistance rating, and Class 3 cables are listed above Class 2 cables because Class 3 cables can substitute for Class 2 cables.