Southwire's Romex SIMpull Type NM-B (nonmetallic-sheathed cable) may be used for both exposedand concealed work in normally dry locations at temperatures not to exceed 90 (with ampacity limitedto that for 60 conductors) as specified in the 2011 National Electrical Code. NM-B cable is primarilyused in residential wiring as branch circuits for outlets. switches. and other loads. NM-B cable may berun in air voids of masonry block or tile walls where such walls are not wet or damp locations. Voltagerating for NM-B cable is 600 volts.Copper conductors are annealed (soft) copper and UL ListedCable is available in a variety of colors. lengths and gaugesUnique (SlikQuik TM infused membrane) jacket TM construction allows for 50% reduction in pulling force resulting in easier installationNM-B has 2. 3 and 4 conductors and available with 2 neutrals. construction designed for easier pulling