Power systems of residential, civil and industrial buildings. Architectural, floodlight, outdoor and indoor lighting, road lighting. Cable power lines 10, 0.4 kV. Power systems of residential, civil and industrial buildings. Architectural, floodlight, outdoor and indoor lighting, road lighting. Cable power lines 10, 0.4 kV. Overhead transmission lines 10, 0.4 kV. Indoor and outdoor transformer substations 10/0.4 kV. Load calculations, calculations of voltage drop and short-circuit current. Lightning protection systems and earthing.