NM-B
Applications
Type NM-B (Nonmetallic-sheathed Cable) may be used for both exposed and concealed work in normally dry locations at temperatures not to exceed 90 degrees C (with ampacity limited to that for 60 degrees C conductors) as specified in the National Electrical Code. NM-B cable is primarily used in residential wiring as branch circuits for outlets, switches, and other loads. NM-B cable may be run in air voids of masonry block or tile walls where such walls are not subject to excessive moisture or dampness. Voltage rating for NM-B cable is 600 volts.
Specifications
Type NM-B cable meets or exceeds UL Standard 83, UL Standard 719, Federal Specification A-A-59544 and requirements of the National Electrical Code® (NFPA 70).
Construction
Type NM-B cable is manufactured as 2 or 3 conductor cable, with a ground wire. Copper Conductors are annealed (soft) copper. Stranded conductors are compressed stranded. Phase conductors are lead-free polyvinyl chloride (PVC) insulated, nylon jacketed, color-coded for identification purposes, and jacketed with moisture and fungus resistant lead-free PVC. Jackets are color-coded for ease of conductor size identification: 14 AWG – White; 12 AWG – Yellow; 10 AWG – Orange; 8 & 6 AWG – Black.
Product Table
Recommended Sample Specifications
Cable shall be UL listed type NM-B, suitable for operation at 600 volts in all installations as specified by the National Electrical Code®. Conductors shall be annealed copper.
