25 Electronics Technical Information Reprinted with permission from NEC 2026 National Electrical Code ®, copyright © 2026, National Fire Protection Association, Quincy, MA 02269. This reprinted material is not the complete and official position of the NFPA on the referenced subject, which is represented only by the standard in its entirety. National Electrical Code® and the NEC© are registered trademarks of the NFPA. Communication wire and cable for premise installations in accordance with Article 722, and other applicable parts of the National Electrical Code (NEC), latest issue. Communication wire and cables for Canada are in accordance with the harmonized Canadian Standard Association C22.2 No. 214, Underwriters Laboratories UL 444, latest issue. FIRE RESISTANCE LEVEL TEST REQUIREMENT NEC Type References (Highest) Plenum Cables NFPA 262 (Steiner Tunnel) CSA-CMP (Steiner Tunnel) CMP CL3P CL2P FPLP CATVP Riser Cables UL-1666 (Vertical Shaft) CMR CL3R CL2R FPLR CATVR General-Purpose Cables Multiple Floors UL-1581 (Vertical Tray) CSA-CMG (Vertical Tray) CMG CM CL3 FPL CATV (Lowest) Residential Cables Restricted Use UL-1581 VW-1 CMX CL2 CL3X CATVX Notes: 1. Cables with a higher fire resistance level may be substituted for those with a lower fire resistance level. 2. Non-fire rated outside plant telephone cables may not run outside of a rigid metal conduit more than 50 feet from the point of entrance into a building. 3. Cables rated cmg or cm may be used in runs penetrating one floor. ARTICLE 722.132 Cable Uses and Permitted Substitutions CABLE TYPE USE PERMITTED SUBSTITUTIONS CMP (FT6) Communications plenum cable CMR Communications riser cable CMP CMG (FT4) CM (FT1) Communications general purpose cable CMP, CMR CMX (FT1) Communications cable, limited use CMP, CMR, CMG, CM Note: Based on Article 722.132 and Table 722.132 ARTICLE 725 Cable Uses and Permitted Substitutions CABLE TYPE USE PERMITTED SUBSTITUTIONS CL3P Class 3 plenum cable CMP CL2P Class 2 plenum cable CMP, CL3P CL3R Class 3 riser cable CMP, CL3P, CMR CL2R Class 2 riser cable CMP, CL3P, CL2P, CMR, CL3R PLTC Power-limited tray cable CL3 Class 3 cable CMP, CL3P, CMR, CL3R, CMG, CM, PLTC CL2 Class 2 cable CMP, CL3P, CL2P, CMR, CL3R, CL2R, CMG, CM, PLTC, CL3 CL3X Class 3 cable, limited use CMP, CL3P, CMR, CL3R, CMG, CM, PLTC, CL3, CMX CL2X Class 2 cable, limited use CMP, CL3P, CL2P, CMR, CL3R, CL2R, CMG, CM, PLTC, CL3, CL2, CMX, CL3X Note: Based on Article 722.122 and Table 722.122 Type CM — Communications wires and cables Type CL2 and CL3 — Class 2 and Class 3 remote-control, signaling and power-limited cables Type PLTC — Power-limited tray cable A → B Cable A shall be permitted to be used in place of Cable B Figure 722.122 Limited-Energy and Communications Cable Substitution Hierarchy CMP CMR CMG CM CMX CL3P CL3R PLTC CL3 CL3X CL2P CL2R CL2 CL2X Plenum Riser General Purpose Dwellings Type CM — Communications cables A → B Cable A shall be permitted to be used in place of Cable B Figure 722.132 Listed Communications Cable Substitution Hierarchy *CMG can be substituted for CM—CM can NOT be substituted for CMG CMP CMR CMG CM CMX Plenum Riser General Purpose Dwellings * NEC/CEC Substitution Chart
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