Hey guys,
A friend of mine has a product that the case is steel (which on of the objectives is to shield the circuit) and it goes on top of a wooden structure. He is going through a homologation process and there is a test where they touch the body (steel case) with 4kV (Guess to test the protection against ESD). He asked me if grounding the case he wouldn't have a problem.
In my opinion, as long it's a good grounding it won't be a problem. But where it should be grounded? In the mains earth or the ground of the circuit is fine?
I do believe that the correct one should be the mains earth, but where we live, most houses and buildings don't have a good grounding system or, even, don't have one at all.
So is there any problem using the circuit ground?
PS: The circuit works fine, it's just that for him to sell it to this client it has to go through this testings.