Also Known As:

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

Conductor:

THHN THWN-2 conductors are constructed of annealed soft copper that follows ASTM B3 and ASTM B8 standards. 

Insulation:

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.