Southwire® Romex® Brand SIMpull® NM-B (non-metallic sheathed) cable may be used for both exposed and concealed work in normally dry locations at temperatures not to exceed 90 deg C (with ampacity limited to that for 60 deg C conductors) as specified in the National Electrical Code. NM-B cable may be run in air voids of masonry block ortile walls where such walls are not wet or damp locations.