UL 719 Ed. 14-2025

Nonmetallic-Sheathed Cables - Published Date: June 26, 2025

1.1 These requirements cover nonmetallic-sheathed cables containing 2 – 4 thermoplastic-insulated circuit conductors, with a grounding conductor, in the constructions indicated in . These cables are intended for use in accordance with Article 334 and other applicable parts of NFPA 70. Type NMC cable is for use in dry, moist, damp, and corrosive locations, and Type NM cable is for use in normally dry locations. Both types carry the suffix letter "-B" to designate the use of conductors with 90 °C insulation.  Type  Construction  Number of circuit conductors  Size of circuit conductors  NMC  flat  2 or 3  14 – 10 AWG copper or 12 – 10 AWG aluminum or copper-clad aluminum  NM  flat  2  14 – 2 AWG copper or 12 – 2 AWG aluminum or copper-clad aluminum  flat  3  14 – 10 AWG copper or 12 – 10 AWG aluminum or copper-clad aluminum  round  2, 3, or 4  14 – 2 AWG copper or 12 – 2 AWG aluminum or copper-clad aluminum  NM with -PCS  flat  2 or 3  14 – 10 AWG copper or 12 – 10 AWG aluminum or copper-clad aluminum and 18 – 16 AWG copper control/signal conductors  round  2 or 3  1.2 A cable to which the designation "ST1" (signifying "limited smoke") is applied as a type-letter suffix complies with the test criteria for smoke release and for cable damage height stated in UL 1685.