NM-B (nonmetallic-sheathed) cable NM-B cable is primarily used in residential wiring as branch circuits for outlets, switches, and other load Cable may be used for both exposed and concealed work in normally dry locations at temperatures not to exceed 194 degrees Fahrenheit Voltage rating for NM-B cable is 600 volts. Listed per UL Standard 719 UL 83 (Conductor Construction) ASTM B-3 and B-8 Federal Specification A-A-59544 National Electrical Code, NFPA 70 REACH/RoHS Compliant
