Electric switch appliance and quick-assembly

The present invention relates to an electric switch assembly comprising two multipolar appliances, each of which comprises an external body provided with a front face, upper and lower transverse faces, side faces and a rear face notably for fixing to a support, wherein at least one of the appliances has breaker properties; the appliances have polar power links including internal power conductors housed in the body and upstream and/or downstream power connection terminals having apertures which open onto the front face for connecting external conductors to the power conductors. An electric switch assembly including a multipolar quick-assembly appliance and a quick-connect appliance, wherein the body of an appliance, or its power terminal strip, is directly fixed and interlocked with to the body of an adjacent appliance. The interconnection between the various appliances is rapidly performed by multipolar blocks capable of being pressed on the front surfaces of appliances and being elastically plugged into their terminals.