low-voltage equipment, voltage from 50V to 1000V, volume from 15 to 60 dm3 ): 1. Electrical installations of buildings and structures: assemblies, cabinets, boards, boxes;lead-in, power supply, lighting, apartment-type, etc.2. Electrical devices and household appliances and similar: audio- and video devices, radio and TV-sets;personal electronic computer systems (PCs);low-voltage equipment connected to personal computers