Grounding issues with on-site instruments
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I would like to ask the experts: According to the new regulations regarding the grounding design of instrument systems, it is required that the enclosures of field instruments be grounded. I would like to know whether all the enclosures of field instruments need to be grounded How exactly do I connect it? Are there any requirements regarding where it should be connected? How many square units of wire? What is the color of the thread? Are there any organizations that have already implemented this? Could you give some advice? Thank you!
https://www.sohu.com/a/221645360_691475 It seems that the content on this page is quite comprehensive; it can serve as a reference for learning!
SHT 3081-2019 \"Code for Design of Grounding of Instrumentation in Petrochemical Industries\" 4.1.5 In explosive gas environments, the metal enclosures, metal protection boxes, and metal wiring boxes of field instruments in non-intrinsically safe systems shall be provided with protective grounding, whereas such enclosures, protection boxes, and wiring boxes for field instruments in intrinsically safe systems need not have protective grounding.
There are standard specifications to refer to for grounding. Some meters must be grounded, while others cannot be grounded on-site; this needs to be determined based on the actual conditions and relevant standards.
May I ask which ones must be grounded on-site and which ones cannot? Could you be more specific?
Why don’t you go and check the standard specifications yourself?
1. Check the instrument’s installation manual; there are requirements listed there； 2. All except intrinsically safe types must be grounded
That’s exactly why I’m seeking help – because I can’t understand it.