Electrical connection parts, in particular electrical plug devices, couplings, adapters, sockets, plugs, terminals for electrical lines; electrical junction boxes; electrical terminal boxes; antennas; electrical display devices; electronic display devices; cover plates for covering electrotechnical cover plates; cover plates for covering electronic apparatus; stored computer programs; stored computer software; remote control devices; electrical/electronic devices/appliances for domestic and building services engineering which are connected to one another wirelessly and/or by wire, in particular via an installation bus system, and transmit commands for influencing regulating, control, monitoring, measuring, transmission and recording devices; interfaces [interface devices], in particular of domestic and building technology; couplers for data processing; optical lamps; light-emitting diodes [LEDs]; light controllers; light-signalling devices, in particular dimmers; light intensity meters; regulating, control, monitoring, measuring, monitoring, switching and recording devices, in particular of domestic and building technology; electrical/electronic switches, in particular installation switches, device installation switches, toggle switches, rocker switches, rotary switches, push-button switches, push-button switches, pull switches, slide switches and multiple switches; electrical control panels; electrical switchboards; transmitters for electrical signals; transmitters for electronic signals; smart cards [cards with integrated circuits]; electrical controls; current rectifiers; current transformers; current monitors, in particular for lighting equipment; sensors for detecting movements [motion detectors], noise, brightness, gases, smoke, temperature or other physical variables for applications in domestic and building services engineering, in particular for lighting control, room and building monitoring; electrical transformers [switched-mode power supplies]; electronic transformers [switched-mode power supplies]; electrical distribution cabinets; electrical distribution boards; time switchgear, in particular for controlling electrical appliances; automatic control equipment for lighting systems in the form of electronic control devices; control devices for synchronizing light and sound effects; apparatus and instruments for heavy current engineering, namely for conduction, conversion, storage, regulation and control; apparatus and instruments for light current engineering, namely for communications, high frequency and control engineering; computer programs for controlling light, music and laser shows; devices for recording, transmission, analysis and reproduction of sound and images; electrical junction cases; electrical terminal cases.;