Abstract: A method of forming a twisted pair of wires for use with Ethernet-based networks. At least two wires are extruded with a cross-linked polyolefin insulating composition marketed under the registered trademark, EXRAD®. The wires are twisted together with a consistent lay length to form a cable. The cable is irradiated to become thermoset. Electrical properties of the extruded wire are controlled during the extrusion step and concentricity of the wire and surrounding insulation is also monitored and controlled. The cable can be jacketed to provide greater mechanical protection.