Issues related to potential errors in instrument grounding

Thread Content

What potential hazards can arise from the improper grounding of various instruments listed below, and what are the reasons for this? 1. The working ground plate and the protective ground plate in the control room are not separated. 2. When the cable passes through the junction box, the shielding layers of both single-core and multi-core cables are connected to the junction box enclosure. 3. When the cable passes through the junction box, the shielding layer of single-core cables is connected to the housing of the junction box. The shielding layer of the multi-core cable is not connected to the junction box, but is connected to the working ground plate on the side of the control room junction cabinet. 4. The control panel is the instrument located within the device; the cables are connected directly to the control panel. There is no working ground nearby, so the cable shielding layer is connected to the control panel’s enclosure.