Thanks, Richard, for the true facts. However, we can look at the facts another way. Since the test is passed, provided the fault does not get worse, the product remains safe. It's not an ideal situation, but it seems that something like a 100 A test would be required in order to detect a fault of either type described.

On 2019-05-22 17:28, Richard Nute wrote:

Hi Regan and all:

As I’m sure you know by now, I subscribe to engineering principles, not to the various safety standards.  Some years ago, I did some tests to determine the better production-line test for the grounding circuit. I documented my findings in an article in the Product Safety Newsletter, Volume 10, Number 2.

Neither the high-current test nor the ohmmeter (or continuity) test are likely to find broken strands or loose connections.  I have attached my article.

Best regards,

Rich




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