These requirements cover 60 ?C 250??(140 ?C 482?? single- and multiple-conductor power-limited circuit cables for use as fixed wiring within buildings (some are also marked for direct burial) principally for Class 3 and Class 2 circuits as described in Article 725 and other applicable parts of the National Electrical Code (NEC). Cables covered by these requirements are: a) Types CL3P and CL2P (plenum cables)@ b) Types CL3R and CL2R (riser cables)@ c) Types CL3 and CL2 (commercial cables for other than plenum@ riser@ or tray uses)@ d) Types CL3X and CL2X (cables for limited use)@ and e) Type PLTC (cable for non-plenum and non-riser Class 3 and Class 2 circuits in general and in trays).