400 Copper wire, 400 building cable, 400 hook up wire, 400 conduit wire, 400 nylon wire, 400 construction cable, 400 thermoplastic-insulated copper wire, 400 THHN-PVC tray cable. copper wire, thwn wire, 400 kcmil copper wire
THHN THWN-2 conductors are constructed of annealed soft copper that follows ASTM B3 and ASTM B8 standards.
The cable is insulated with a thermoset plastic jacket (PVC) that is flame-retardant, sunlight-resistant, lead-free, strong, and stable. Without being too bulky, it ensures that the cable can be used in harsh conditions. The jacket is color-coded in accordance with ICEA Method 4.