Southwire 11580817 THHN Wire by Southwire. $11.64. 90 C, small diameter, general purpose, 600V building wire to be used as power, lighting, and control wiring. Suitable for use in conduit and raceways. Solid or stranded copper with flame retardant PVC insulation and nylon jacket. Resistant to oil, gasoline, chemicals, and abrasion. UL listed. 50'. Card.