Annealed (soft) copper conductor cable, with a ground wire, primarily used in residential wiring as branch circuits for outlets, switches, and other loads. 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 degree C conductors) as specified in the National Electrical Code 1. 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. Meets or exceeds UL Standard 83, UL Standard 719, Federal Specification A-A-59544, and requirements of the National Electrical Code.