1. IN AN ELECTRICAL SWITCH, THE COMBINATION COMPRISING A METAL CASING, A CARRIAGE MOVABLE IN SAID CASING, MEANS FOR MOVING SAID CARRIAGE WITHIN SAID CASING, A CONTACTOR MOUNTED ON SAID CARRIAGE AND MOVABLE THEREWITH, AN INSULATING MEMBER MOUNTED ON SAID CASING OPPOSITE SAID CONTACTOR AND FORMING ONE WALL OF SAID CASING, AT LEAST A FIRST CONTACT MOUNTED ON SAID INSULATING MEMBER AND ENGAGABLE BY SAID CONTACTOR, AT LEAST ONE TAB FORMED INTERGALLY WITH SAID CASING AND PROJECTING ADJACENT SAID INSULATING MEMBER ON THE SIDE THEREOF REMOTE FROM SAID CASING, AND AT LEAST A SECOND CONTACT MOUNTED ON THE INNER SIDE OF SAID INSULATING MEMBER AND HAVING A PORTION EXTENDING THROUGH SAID INSULATING MEMBER AND SECURED TO SAID TAB FOR CONNECTING SAID CONTACTOR TO GROUND THROUGH SAID CASING.