Dear Experts, I checked several standards but they do not seem to dictate the coupling paths to test. The equipment that we have, has all seven coupling paths for single-phase power port: L-GND, N-GND, PE-GND, LN-GND, LPE-GND, NPE-GND, LNPE-GND. Is it required to test all? Where is it mentioned (standard)? **I used to test all seven paths when testing consumer products. Now I am testing Industrial products and someone indicated to test only L-GND, N-GND, PE-GND. Thanks & Regards, WNya
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