Related knowledge:
1, grounding device connection should be reliable, grounding wire should be integral or welded. The connection between the grounding body and the grounding trunk line should have the disconnection point for measuring the grounding resistance, and the spiral connection is adopted.
2, grounding wire welding should adopt lap welding, lap length; Local steel should be twice the width, and should have three collar edges for welding; The connection length of the round steel tower is 6 times of the diameter and should be welded on both sides.
3, unconditional welding, can consider using bolt connection, but must ensure the interface area; Check washer and reliable rust prevention measures shall be adopted for bolts.
4. When the grounding wire is connected to the electrical equipment, it should be pressed by bolts, and each electrical equipment should be connected to the grounding trunk separately. It is forbidden to connect several devices that need to be grounded in series on a ground wire.