Southwire Co Southwire’s Energy Division manufactures products to serve the full spectrum of the T&D system, from the point of generation to where power is delivered to residential, commercial and industrial users. With solutions from high-voltage overhead conductors and integrated underground systems up to 230kV to our complete offering of substation wiring products, medium-voltage cables with EPR or XLPE insulation, innovative low-voltage cables and a full line of Cable-in-Conduit, we can manufactu...