A switch device, includes a casing having an inlet opening for introduction of a conductive cable, having at least two conductors and an insulating sheath. The casing has an open end which is closeable by a lid. Received in the interior of the casing are contact members having terminals which point in the direction of the lid, for penetration through the insulating sheath of the cable and contacting the conductors. A pressure pad is secured interiorly on the lid in an area of contact-making between the contact members and the conductors, for exerting a pressure onto the cable, whereby the pressure pad so projects into the interior of the casing as to firmly press the cable onto the contact members via the connected terminals, when the lid is closed.