1. Electrical operators should concentrate. Before the test pen determines that there is no electricity, all wires should be regarded as "live" and cannot be touched by hand. They should not absolutely believe in insulators, but should think that they are charged.
2. Before work, carefully check whether the tools you use are safe and reliable, and wear necessary protective equipment to prevent accidents at work.
3. Necessary measures should be taken to maintain the line, and a warning sign "No switching on when someone is working" should be hung on the switch handle or on the line to prevent others from sending electricity halfway.
4. When using a pencil, please pay attention to the test voltage range. It is forbidden to use beyond the scope. Pencils commonly used by electricians can only be used at voltages below 500 volts.
5. All wires removed at work should be handled well, and the live wires should be wrapped to prevent electric shock.
6. The capacity of wires and fuses used must meet the specified standards, and the switch selection must be greater than the total capacity of the controlled equipment.
Brief introduction of electric power:
Electrical engineering is the core and key subject in modern science and technology.
The traditional and broad definition of electrical engineering refers to the sum of related disciplines used to create and produce electrical and electronic systems. With the rapid development of science and technology, the concept of electrical engineering has gone far beyond the above definition. Professor Stanford University pointed out: "Today's electrical engineering covers almost all engineering behaviors related to electrons and photons."
It is the great progress of electronic technology that has promoted the arrival of the information age based on computer network and changed all aspects including human life and work style. Electrical engineering disciplines in American universities, also known as electrical engineering departments, electrical engineering and information science departments, electrical engineering and computer science departments, mainly focus on computers and information technology.