If you just want to know the electrical knowledge of daily life, you can consider buying books such as home improvement electrician and home appliance maintenance. Primary and intermediate maintenance electricians also introduce the circuits of daily life, and the books of primary workers are generally illustrated, which makes it easier for beginners to get started.
If you want to have a deep understanding of electricity, you need to learn a lot, such as electronic technology foundation, power electronic digital-analog circuit, electrical control and PLC, single chip microcomputer, C language, automatic control principle, HMI, microcomputer principle, etc., and you need to have advanced mathematics foundation.
Extended content:
Electrician:
Refers to the science and technology that studies the objective laws and their applications in electromagnetic fields, as well as the two industrial production systems of electric power production and electrician manufacturing.
Electrician common sense:
Before decoration, there must be a (strong current and weak current) construction drawing, and when completed, an electrical engineering completion drawing shall be provided.
Electrical installation construction personnel should hold relevant certificates.
Wiring should be color-separated, phase line (L) should be uniform in color, neutral line (N) should be black, and protection line (PE) should be yellow and green.
The appearance of plastic wire protection tube and junction box should not be damaged or deformed.
Generally, the pipes are 4 branches (DN 15) and 6 branches (DN20). The wall thickness of the smooth pipe is 2 .0 0.3mm, and there are no more than 4 threads.
General electrical appliances are equipped with 2.5mm2 copper conductor. High-power electrical appliances such as air conditioners should be equipped with 4mm2 or 6mm2 copper conductors.
Strong current lines and weak current lines are prohibited from passing through the same bushing.
The power supply, telephone, TV and other sockets in the same room should be at the same level, and the height difference should be less than 5 mm.
When installing lamps, all design and installation fixing points of lamps must be fixed.
Setting of junction box in ceiling: junction boxes should be set where leads and wiring are needed. And shall not be fixed on the wooden keel, should be fixed at the top.
When the downlight installation needs to be punched, the position of the main keel should be verified to avoid cutting and damaging the keel.
Lighting lamps should be equipped with switches separately, and the lights of each lighting circuit should not exceed 2KW (excluding lanterns). Combined lamps can be controlled in groups.
When the ordinary chandelier uses the cord itself as the suspension. Only applicable to lamps with mass lower than 1kg. For lamps above 1kg, the hanging chain must be used, and the flexible cord is not stressed.
According to the position of electrical equipment, determine the pipeline direction, elevation and the position of switch and socket, and then slot.
The depth of the wall (ground) groove shall ensure that the concealed pipeline is not exposed after repair and does not damage the stressed steel bar.
When the pipeline length exceeds 15 m or there are two right-angle bends, cable boxes should be added.
References:
Baidu Encyclopedia Entry Electrician (Web link)