| 1. Service switching device, such as a circuit breaker or residual current device, having an insulating material housing which
has at least one front face and one attachment face as well as narrow and broad faces which connect the front and attachment
faces, and which service switching device has, in the area of the narrow faces, a terminal accommodation area for a connecting
terminal for the connection of an electrical connecting conductor, having a screw connecting terminal which comprises:
a clamping part, which is essentially in the form of a frame and has longitudinal, narrow and broad faces, a clamping screw
which is held in a threaded opening in the clamping part, and a busbar which passes through the interior of the frame-like
clamping part and is arranged such that it can move with respect to the clamping part, and whose broad face when in the installed
state is oriented parallel to the broad face of the clamping part, with the clamping part being movable in its longitudinal
direction relative to the busbar by rotation of the clamping screw, such that a connecting conductor can be clamped firmly
between the side of the busbar which faces away from the clamping screw and the broad face of the clamping part which faces
away from the clamping screw, wherein the busbar is fitted at its free end with an approximately rectangular contact plate
whose length is greater than the width of the interior of the clamping part which holds the busbar, such that the free ends
of the contact plate project beyond the frame-like clamping part on both sides when the busbar is in the installed state,
with its length being less than the height of the interior of the clamping part which holds the busbar,
wherein holding means for mounting the free ends of the contact plate in a fixed position are provided close to the narrow
face of the housing in the interior of the housing.
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