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.