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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
Type CATV - Community antenna television and radio distribution cables
Plenum - Cables installed in ducts, plenums, and other spaces used for environmental air.
Riser - Cables installed in vertical runs and penetrating more than one floor, or cables installed in vertical runs in a shaft.
General Purpose - For use in locations other than risers or plenums.
Dwellings - Cables for use in one, two, or multi-family dwellings and in raceways.
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CABLE USES AND PERMITTED SUBSTITUTIONS
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Cable Type
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Use
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Permitted Substitutions
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CMP
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Communications plenum cable
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-----
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CL3P
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Class 3 plenum cable
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CMP
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CL2P
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Class 2 plenum cable
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CMP, CL3P
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CATVP
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Coaxial plenum cable
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CMP
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CMR
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Communications riser cable
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*CMP
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CL3R
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Class 3 riser cable
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CMP, CL3P, CMR
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CL2R
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Class 2 riser cable
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CMP, CL3P, CL2P, CMR, CL3R
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CATVR
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Coaxial riser cable
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CMR, CATVP
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PLTC
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Power-limited tray cable
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-----
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CMG
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Communications cable, general purpose
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*CMP, CMR
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CM
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Communications cable, general purpose
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*CMP, CMR, CMG
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CL3
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Class 3 cable
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CMP, CL3P, CMR, CL3R, CMG, CM, PLTC
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CL2
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Class 2 cable
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CMP, CL3P, CL2P, CMR, CL3R, CL2R, CMG, CM, PLTC, CL3
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CATV
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Coaxial general purpose cable
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CMG, CM, CATVR
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CMX
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Communications cable, limited use
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*CMP, CMR, CMG, CM
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CL3X
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Class 3 cable, limited use
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CMP, CL3P, CMR, CL3R, CMG, CM, PLTC, CL3, CMX
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CL2X
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Class 2 cable, limited use
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CMP, CL3P, CL2P, CMR, CL3R, CL2R, CMG, CM, PLTC, CL3, CL2, CMX, CL3X
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CATVX
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Coaxial cable, limited use
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CMX, CATV
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Information taken from Articles 800, 725 and 820 of the 2011 National Electrical Code.
Please consult these articles for details regarding specific applications.
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