component namely a switch unit 1 the switch unit 1 includes hook up segments 2 3 and 4 which are located at the forward or front end of the motor safety switch as viewed in fig1 and 4 identical hook up segments are provided at the back end of the switch unit 1 as is readily apparent from fig9 the segments 2 3 and 4 are covered partially or totally by small plates unnumbered to prevent physical contact with connection or contact making screws 57 fig9 however slits or openings unnumbered in fig9 allow hook up conductors 58 to be connected to conventional clamps 68 of the switch unit contact system unnumbered the connection or contacting making screws 57 for example can be operated by a screw driver passing through holes 25 through 28 fig1 and 4 a hole 56 fig9 and another hole adjacent the holes 28 56 of the cover or cover component 5 the holes 25 through 27 are formed in a front part 23 of the cover 5 whereas the holes 28 56 and another unillustrated hole are provided in the rear cover part 23 the switch unit 1 carries a pushbutton mechanism or component 22 which includes two manually actuatable.