THHN, known as Thermoplastic High Heat Resistant Nylon, and THWN-2, known as Thermoplastic Heat and Water Resistant, are considered general purpose wires in accordance with the NEC. Both can be installed in conduit, duct, and other fixed raceways where it is wet or dry. Use the filters on the left to sort by size and conductor count. All are made in the USA and available by the foot or in bulk.
For questions about THHN THWN-2 wire you can call us at 888-681-1768.