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There are generally two reasons for grounding


There are generally two reasons for grounding: one is to prevent injuries and death caused by electric shock; the other is to prevent static electricity from causing damage to the appliance itself. The outer shell of the TV is made of insulating material, and it is far away to watch TV without grounding. The computer monitor is placed on the desktop, with frequent contact. More importantly, the monitor parts are more precise and afraid of static electricity. Due to the static electricity on the monitor screen, a lot of dust can be absorbed and affect the vision. So ground. Strictly speaking, the previous electronic watches needed more grounding wires, because the LCD digital watches used a lot of plastic from the inside to the outside, it is very easy to generate static electricity, and the impact of static electricity on the watch circuit is very large.

Under normal circumstances, the metal casing of the electrical equipment is insulated from the live parts. The casing will not be charged, but if the internal insulation of the appliance is aged or damaged, electricity may be transmitted to the metal casing. If the casing is not grounded, You will get an electric shock when you go up. If the metal case is grounded, the current will flow into the ground through the ground wire, and people will not get an electric shock when they touch a charged metal case. Grounding is to use a thick wire (preferably copper wire, aluminum wire is easy to be corroded or broken, and generally cannot be used as a ground wire). Connect one end of it to the electrical housing and the other end to the ground. A certain depth and a certain length of angle steel, usually this connection line is also called the ground line.