1. Risk of electric shock: Because of the experimental equipment there may be a high-voltage power supply or capacitors and other components, if the grounding wire is directly grounded, may lead to people coming into contact with the grounding of the equipment, increasing the risk of electric shock.
2. Electromagnetic interference: High-power currents in experimental equipment may cause electromagnetic interference, and direct grounding increases the loop area of the ground, which can lead to the diffusion and conduction of interference signals.
Therefore, in order to protect the safety of experimental equipment and reduce electromagnetic interference, usually use a special grounding device or grounding line for grounding, such as the use of grounding resistors or grounding coils and other devices to provide adequate safety and reduce the effect of electromagnetic interference. At the same time, this needs to be designed and installed according to relevant standards and codes to ensure the safety of equipment and personnel.