Southwire 11589958 12 Solid Building Wire, Red, 500 Ft. It is also used as a conductor in NM-B, UF-B, SER, SEU and MC. Southwires THHN is rated for 600-Volt and has a heat capacity of up to 90°C. Stranded or Solid Solid. Can be used in wet or dry locations. byJuly 5, 2026
