Why the metal shell of electrical equipment to grounding details

Prepared for the metal shell and the charged part is insulated, the shell will not be charged, but if the internal insulator of the appliance is aging or damaged, the electricity may be transmitted to the metal shell up, if the shell is not grounded, then the person if touched on the electrocution, if the metal shell is grounded, the electric current will flow into the earth through the ground wire, the person touched on the charged metal shell will not be electrocuted. Grounding is a thicker wire (preferably copper wire, aluminum wire is easily corroded or broken, generally can not be used as a ground), one end of it connected to the shell of the appliance, the other end is connected to a certain depth of burial in the ground, and a certain length of the angle, usually the connection line is also called the ground. Zhejiang Yunkai Automation Equipment Co.