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 degree C (with-Ampacity limited to that for 60 degree C conductors) as specified in the NEC 1. 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-Volt. #12 AWG residential wiring for outlets, switches and other loads Copper (CU) Conductors 12 gauge has Yellow color-coded jacket for size identification 0