I am an electrical engineer and I design low voltage systems 1- Load estimation 2- Lighting 3- Sockets 4- wiring 5-Panelboard 6- cable sizing 7- transformer sizing 8- generator sizing 9-UPS and light current systems 1- Fire alarm system 2- Sound system 3- CCTV system 4-MATV system 5- Telephone system 6- Nurse call system