I am working on an adapter device that requires pretty high isolation between the pins (1-5 kV depending on which pins) per the UL spec, but we want to add a datalogging feature into it that will need to have some connections between these pins. I'm not sure how to make these things coexist.
For example, a voltage divider to bring a measured voltage down to something the microcontroller can handle will create a path between that voltage and ground (between Line and GNDPWR in the simplified schematic below). If we assume the hipot test is "only" 1 kV and the allowed leakage is 30 µA (if I am understanding the requirements correctly) I'd have to use a divider with a total resistance of nearly 35 MΩ, but that isn't likely to place nice with the impedance of the ADC. Still that one seems at least somewhat manageable.
It seems like an integrated power supply to bring the supply voltage down to power the logger is even more problematic. Lets say 120 V ac down to 3.3 V. It can't see how it could provide that kind of isolation between the live and neutral pins (it could isolate between those and the 3.3 V output, but that's not what the standard cares about).
Is there a way to reconcile these? Or is this a case of an application that just can't work within the bounds of this isolation requirement?
To clarify, I am not asking how to isolate the microcontroller from 120 V ac, I know how to do that (and it isn't required here). What the spec requires is that the adapter pins be isolated from each other. So in the image below, the isolation needs to be between NEUT, LINE, and GNDPWR.
There is some deliberate vagueness for NDA reasons, but I can try to clarify further if additional information is required.

pass? ... it can meanto allow passageor it could meanto successfully complete a test\$\endgroup\$