Process Engineering Division – Instrumentation and Automation Section – Daily Question – Question dated 2020-07-28
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Process Engineering Division – Instrumentation and Automation Section – Daily Question – Question from 2020-07-28: Discussion question: 189. Can the grounding of signal circuits, the shielding ground, and the protection ground be shared?
The signal circuit ground and the shielding ground can be shared, but they cannot be shared with the protection ground.
The signal circuit ground (working ground) and the shielding ground can share the same grounding grid, but they should not be connected to the protection grounding grid; instead, a separate grounding grid should be provided, with a grounding resistance of no more than 10 ohms.
The signal circuit ground (working ground) and the shielding ground can share the same grounding grid, but they should not be connected to the protection grounding grid; a separate grounding grid should be provided.
The protected area cannot be shared with others