Hi David. I know little about the technical aspects of this issue, and you seem to have these well covered.
I understand that you have a voltage drop between the hot (supply) side of your wire and its arrival at the CLP.
It might be worthwhile investigating whether there's been some rodent action.
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A journey of a thousand+ (epic) miles, begins with a single step, (to the door of an 8). Lau Tzu
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