Article 500.4 (a)
We are working on project that requires drawings for a C1D2 location.
What are the qualification requirements if any to issue approved hazardous location drawings.
Generally a professional engineer can sign off. Usually a mechanical engineer sometimes an electrical engineer. It take a knowledge of hazardous material and ventilation
I agree that it should be mandated that the person responsible for approving the H.L.drawings be qualified. I'm looking for the documentation that states who is qualified. Years ago I believed it was a P.E. .
Try NFPA 30. I think it is available online at nfpa.org. The National Electric Code (NFPA70) has a section. I know it is available online.
Also look at American Petroleum Institute (API).
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