Basic knowledge of electric power: including basic concepts such as current, voltage, power and resistance, as well as the principles and usage of basic electrical equipment such as circuits, power supplies and switches.
Common sense of safe use of electricity: including the maintenance of electrical appliances, the correct use of plugs and sockets, the safe use of wires and cables, and the handling methods of electrical faults.
Preventive measures for safe electricity use: including the installation and use of lightning protection devices, grounding protection, leakage protection and other safe electricity facilities.
Case analysis of safe electricity use: analyze the safety accidents caused by improper use of electrical appliances, such as electric shock, fire and short circuit. And how to prevent and deal with these accidents.
Energy-saving knowledge: including how to use electrical appliances reasonably, choose low-power electrical appliances, reduce the use of air conditioners and use energy-saving lamps.