TFFN / TFN / TEWN Copper Building Wire


  • Sizes 18 AWG - 16 AWG
  • Copper building wire
  • Permitted for 600-volt applications
  • Suitable for wet, damp and dry locations
  • Rated gasoline and oil resistant
  • RoHS compliant
  • UL Listed E-156878


Type TFFN (stranded) or TFN (solid) conductors are primarily used as fixture wire as defined by the National Electrical Code (NEC) at temperatures not to exceed 90°C in dry locations. For applications requiring Type MTW, the conductor is permitted for use in dry locations at 90°C or not to exceed 60°C in wet locations or where exposed to oils or coolants. Permitted for new construction or rewriting for 600-volt applications.