Southwire® Romex ® Brand Simpull® NM-B (Nonmetallic-Sheathed) Cable May Be Used For Both Exposed and Concealed Work In Normally Dry Locations At Temperatures Not to Exceed 90°C (With Ampacity Limited to That For 60°C Conductors) As Specified In The National Electrical Code. 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 Wet or Damp Locations. Voltage Rati