An electrical device (10) comprises at least one electric terminal (11) of the type intended to receive and connect a stripped end of an insulated electric wire. A surface (14) of the device is provided with at least one seat (15) for cutting and stripping one end of an insulated wire. This seat (15) is intended to cut the insulation of the insulated wire and strip it from the end of the wire by means of insertion of the end of the wire into the seat (15) followed by axial pulling of the wire before inserting the wire inside the terminal (11).