To take the electrician certificate, you need to go to the electrician training class organized by the local labor department. They have learning materials (electrician work). I mainly study the safety of electrical work and the basic knowledge of electrical work, and generally don't take the actual operation test. Electrician certificate belongs to the operation qualification certificate and does not represent the actual operation skill level. The main projects include line maintenance, high-voltage operation, low-voltage operation and electric power construction. , many of which are effective in the whole country, engaged in engineering wiring construction, equipment maintenance, electric lighting (lighting) construction, etc. In addition, there is the power duty certificate of the person in charge of the Economic and Trade Commission, which is a necessary qualification certificate for the power sector and is only valid in this province. Electrician skill level certification requires electrician certificate (senior technicians need to go to the province for examination), including theory and practical operation. There are many electrical equipment, such as motors, refrigeration (split, central air conditioning, refrigeration), transformers, frequency converters, equipment control, interlocking, high and low voltage lines, substation equipment, numerical control, elevators, fire fighting equipment and so on.