The role of the ground wire What is the role of the ground wire

Ground is in the power system or electronic equipment, connected to the earth, connected to the shell or connected to the reference potential of zero wire. General electrical appliances, the ground wire connected to the shell, in order to prevent electrical appliances due to internal insulation damage shell charged and caused by electric shock.

The role of the ground:

1, to protect human safety: electrostatic discharge will produce a large number of charges, the ground can lead the current to the ground, so as to protect the safety of human life.

2, lightning: tall buildings, all kinds of communication systems will be installed to prevent lightning strike grounding system, encountered a thunderstorm, there is a very good protection, can avoid electrical appliances are damaged.

3, to protect the normal work of the machine: a lot of electrical appliances must have electricity to work, especially in the medical field, the role of the ground is to avoid a sudden power outage will not be affected, can still run some small loads of normal potential.