Wire 8 Thhn Str Blk 500' is "SOUTHWIRE" STRANDED COPPER THHN BUILDING WIRE *8 gauge, 19 strand single conductor *500 ft. *45 amp, 600 volt *90 degree C temp rating (with ampacity limited to that for 75 degree C conductors) *Copper conductors *PVC insulation, nylon jacket *Black *Typical use: used in conduit and cable trays for services, feeders and branch circuits- other applications include automotive, machine tooling, appliances *Don't use without conduit *UL listed *Spool *Discovery ACC, CON, NBR, SUP, HWU.