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Mar15-12, 12:45 AM
P: 3
And SELV applies to your links how?
I don't think I ever refered to SELV.

THe question ask only those above: i.e. when is non-isolation is acceptable and when it is not, and if there are different application classes, and what safety mean are required.

For example when is it important to have a isolate AC-DC converter and when is it Ok to be non-isolated.