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Thanks again, Sorry for my poor explanation. The relay was just one for the test system, not product.

Thanks VEIBLL, This is supposed to be an automated test except for the operator cycling the power switch once. I also thought that switching leads/connections might be the best, but would add time. I did not know if there was a special type of relay or contactor for reliably making the safety...

I must do Hi-Pot and functional test on a product. The product produces nasty -6KV transients on the neutral side. For Hi-pot testing I must keep the ground and neutral isolated. The product chassis must also be isolated from the system to properly measure ground continuity with the hi-pot...