1. Working grounding: In order to meet the operation requirements of the power system or weighing instrument, a point of the power system or weighing instrument is grounded. The electronic truck scale is working grounding. If the T system is used for power supply, it has a good grounding.

2. Lightning protection and grounding: It is composed of lightning protection devices such as lightning strip, lightning arrester, lightning rod and grounding body in a radial or circular form. The lightning arrester of electronic truck scale is connected to the grounding body with (40) mm galvanized flat steel or multi strand copper conductors with a sectional area of not less than 95 mm2.

3. Protective grounding: in order to prevent personal injury caused by insulation damage of electrical equipment, the voltage of its metal shell to ground is limited to the safe voltage, and the exposure of electrical equipment can be called protective grounding. Such as: electrical metal shell, transmission device of electronic truck scale, etc.

4. Repeated grounding: in the TN-C system of low-voltage distribution system, to prevent the loss of grounding protection due to neutral line fault, which may cause electric shock hazard of electronic truck scale and damage the equipment to multiple grounding (make it become TN-C-S system).

5. Anti static grounding: the grounding of electronic truck scale in order to eliminate the harm of static electricity to people and equipment, such as the grounding of some liquid or gas metal transmission pipelines or vehicles and weak current equipment shells.

6. Shielding grounding: In order to prevent mutual interference between circuits due to parasitic capacitance, electric field radiated by circuits or being sensitive to external electric field, necessary isolation must be carried out and shielded metal must be grounded.

7. Grounding with special requirements: such as the grounding of weak point system of electronic truck scale, computer system and medium voltage system, when the neutral point is directly grounded or grounded through small resistance, the weak current system requirements shall be followed.

8. Protective grounding of electrical equipment in flammable and explosive places: electrical equipment, mechanical equipment, metal pipes and metal structures of buildings of electronic truck scale in flammable and explosive places shall be grounded, and jumper wires shall be laid at pipe joints.