FCC standard plug connection

Using the present invention it is possible in an extraordinarily simple manner to make a protective plug connection, which can be disengaged only by means of a tool, from a conventional, commercially available, FCC standard plug connection. This is achieved by means of a securing frame (safety frame) (6) which is designed such that it can be clipped onto the retaining frame of the plug socket in such a manner that one (8) of its four limbs comes to rest between the plug body (3a) and the elastic arm (3b) of the plug (3) and thus prevents the arm (3b) being able to press against the plug body and being able to be moved into a release position.