Abstract: An electrical installation switching device includes a housing, a contact lever and a switch position indication, which is formed from a slide which is guided in the housing such that it can move longitudinally between a first indication position and a second indication position. The sliding movement of the slide is coupled to the movement of the contact lever. Latching means are provided on the slide and on the housing to detachably latch the slider to the housing in the first indication position, and thus to prevent inadvertent movement from the first indication position.