Connector for connecting sections of a multi-phase through-wiring, - having a rack which has a plug extension and - having a socket housing which forms a receiving space for the plug extension of the rack , - having chambers , in the plug extension which serve to receive contacts , wherein - the plug extension has an additional phase selection chamber in which phase contacts L1, L2, L3 and at least one supply contact L are arranged and in which a phase selection element is accommodated, and wherein - a wall of the phase selection chamber has a coding contour , - the phase selection element has a coding structure cooperating with the coding contour , - the cooperation of the coding contour and coding structure determines at least two positions which can be selectively adopted by the phase selection element , in which positions different phase contacts L1, L2, L3 are connected to the supply contact L in each case, characterised in that - the phase contacts L1, L2, L3 are arranged in the phase selection chamber in a first grid which has seven fields arranged next to one another for a three-phase conductor, wherein a phase contact L1, L2, L3 is located in each of the two first fields, the third field is kept free, the supply contact L is located in the fourth field, the fields 5 and 6 are in turn kept free and a further phase contact L1, L2, L3 is located in the field 7, - the phase selection element forms a bridge contact having three contact blades , , , the phase selection element has a second grid having an identical grid dimension to the first grid, and the contact blades , , are located in the first, third and fourth grid fields of the second grid. - having a rack which has a plug extension and - having a socket housing which forms a receiving space for the plug extension of the rack , - having chambers , in the plug extension which serve to receive contacts , wherein - the plug extension has an additional phase selection chamber in which phase contacts L1, L2, L3 and at least one supply contact L are arranged and in which a phase selection element is accommodated, and wherein - a wall of the phase selection chamber has a coding contour , - the phase selection element has a coding structure cooperating with the coding contour , - the cooperation of the coding contour and coding structure determines at least two positions which can be selectively adopted by the phase selection element , in which positions different phase contacts L1, L2, L3 are connected to the supply contact L in each case, - the phase contacts L1, L2, L3 are arranged in the phase selection chamber in a first grid which has seven fields arranged next to one another for a three-phase conductor, wherein a phase contact L1, L2, L3 is located in each of the two first fields, the third field is kept free, the supply contact L is located in the fourth field, the fields 5 and 6 are in turn kept free and a further phase contact L1, L2, L3 is located in the field 7, - the phase selection element forms a bridge contact having three contact blades , , , the phase selection element has a second grid having an identical grid dimension to the first grid, and the contact blades , , are located in the first, third and fourth grid fields of the second grid. <EOS>