12 AWG THHN/THWN-2 Solid Copper, Gray, 2500'

THHN and THWN-2 are types of building wire used in electrical systems, often found in conduit within commercial and industrial settings. THHN (Thermoplastic High Heat-resistant Nylon-coated) is primarily for dry locations, while THWN-2 (Thermoplastic Heat and Water-resistant Nylon-coated, with the "-2" indicating a wet/dry rating) is suitable for both wet and dry locations. Both types feature a thermoplastic (PVC) insulation and a nylon jacket, and can be used with copper or aluminum conductors.