An electrical switch is disclosed and includes a tensioning lever which, in the switched-on state of the switch, assumes a tensioning lever position tensioned by spring tension, and a locking device which can lock the tensioning lever into the tensioned tensioning lever position. In accordance with an embodiment of the invention, the locking device includes a rocker lever, which is attached rotatably to the tensioning lever around a rotary bearing, and a pawl, pivotable around a pivot point, which rests in the locked state on the rocker lever and in this way prevents the pivoting of the tensioning lever and—after an unlocking of the locking device—pivots away from the rocker lever and, in doing so, turns or can at least turn the rocker lever.