Seeking advice on the grounding method for cable metal conduit in the workshop?
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May I ask, do all the cable metal conduit in the workshop need to be grounded? What is the specific method of implementation? Can galvanized pipes be directly welded to the grounding wire? If the conduit is laid along metal supports on a steel platform, and the steel platform is already grounded, can this conduit be considered grounded as well?
Yes, it needs to be grounded; for details, refer to Section 14.1 of GB50303-2015.
Put a hoop around the metal pipe and then ground it; it’s similar to what is done with pipes. You can refer to the catalog L13D10P117 – there should be instructions in that catalog as well, but I don’t have it available.