A barrier cable coupler for coupling two lengths of barrier cable comprising: a coupler body having a bore therethrough; first and second retainer assemblies (205a, 205b), each retainer assembly including: a retainer bolt (213a, 213b), each retainer bolt having a threaded extension extending into the bore of the coupler body; a retainer collar (209a, 209b), mechanically coupled to the respective retainer bolt, each retainer collar including a tapered inner surface (211a, 211b), and one or more wedges (207a, 207b) positioned within each of the retainer collars; wherein the threaded extension of the first retainer assembly is threaded in a first direction and the threaded extension of the second retainer assembly is threaded in a second direction; and a tensioning nut (223, 323), the tensioning nut threadedly coupled to the threaded extensions of the first and second retainer assemblies, the tensioning nut including inner threaded surfaces (225a, 225b) corresponding with the threads of the corresponding threaded extensions such that rotation of the tensioning nut moves the first and second retainer assemblies into the interior of the coupler body. a coupler body having a bore therethrough; first and second retainer assemblies (205a, 205b), each retainer assembly including: a retainer bolt (213a, 213b), each retainer bolt having a threaded extension extending into the bore of the coupler body; a retainer collar (209a, 209b), mechanically coupled to the respective retainer bolt, each retainer collar including a tapered inner surface (211a, 211b), and one or more wedges (207a, 207b) positioned within each of the retainer collars; wherein the threaded extension of the first retainer assembly is threaded in a first direction and the threaded extension of the second retainer assembly is threaded in a second direction; and a tensioning nut (223, 323), the tensioning nut threadedly coupled to the threaded extensions of the first and second retainer assemblies, the tensioning nut including inner threaded surfaces (225a, 225b) corresponding with the threads of the corresponding threaded extensions such that rotation of the tensioning nut moves the first and second retainer assemblies into the interior of the coupler body. a retainer bolt (213a, 213b), each retainer bolt having a threaded extension extending into the bore of the coupler body; a retainer collar (209a, 209b), mechanically coupled to the respective retainer bolt, each retainer collar including a tapered inner surface (211a, 211b), and one or more wedges (207a, 207b) positioned within each of the retainer collars; wherein the threaded extension of the first retainer assembly is threaded in a first direction and the threaded extension of the second retainer assembly is threaded in a second direction; and a tensioning nut (223, 323), the tensioning nut threadedly coupled to the threaded extensions of the first and second retainer assemblies, the tensioning nut including inner threaded surfaces (225a, 225b) corresponding with the threads of the corresponding threaded extensions such that rotation of the tensioning nut moves the first and second retainer assemblies into the interior of the coupler body.