Electrical connector for connecting electrical wires to an electrical apparatus

An electrical connector for connecting electrical wires to an electrical apparatus (1), consisting of a housing (2) defining a cavity (6) in which a printed circuit board (4) is inserted, a receiving socket (10), a contact carrier (14) arranged in the receiving socket, insulation piercing contacts (18) which are held in the contact carrier (14) and are in electrical communication with the printed circuit board (4), and arresting means (28,30,32,34) by which the contact carrier (14) is held in the receiving socket (10), characterized in that the arresting means consist of at least one recess (28) in the contact carrier (14) and of a fastening pin (30) which is insertable into the recess, characterized in that the fastening pin is provided on a plate-shaped fastening element (29), the housing (2) being doubled walled between the receiving socket (10) and the cavity (6) to define a slot between two parallel and spaced walls, each wall having two opposite surfaces, and that the fastening element is insertable into the slot between the two parallel and spaced walls in the housing (2), the fastening pin (30) engaging into the recess (28) in the contact carrier (14).