A ribbon cable with a plurality of spaced apart substantially parallel insulated conductors. The parallel insulated conductors extend along a length of the cable and arranged along a width of the cable. Each insulated conductor has a central conductor surrounded by a structured insulative material formed directly onto the central conductor along substantially the entire length of the cable. The structured insulative material has a plurality of ridges extending from the central conductor along different azimuthal directions. Each pair of adjacent ridges define an angle θ there between greater than about 10 degrees.