Electrical Work / Indoor, Electrical Work / Outdoor, Lighting Systems, Renewable Energy Supply / Installations, Solar Energy Systems / Solutions, Wind Power Plants, Burglar Alarm Installation, Video Surveillance, Fire Alarm Installation, Fire Suppression Installation, Access Control Systems, Smart House Systems, Intercom Systems / Local Networks, Telecommunication and Signaling Systems, Processing Equipment Erection, Lightning Rods Installation, 01.05. Power Supply (Internal and External Power Supply and Lighting Networks / Power Supply Systems / Photovoltaic and Wind Power Plants), Category 1 (01.05), 03.04. Residential / Commercial and Industrial Buildings, Category 3 (03.04), 03.05. Power Supply (Internal and External Power Supply and Lighting Networks / Power Supply Systems / Photovoltaic and Wind Power Plants), Category 1 (03.05), 03.10. Communication Systems (Telecommunication and Signaling Systems / Transmitters / Receivers / Antennas / Amplifiers), Category 1 (03.10)