Dave-
Could there be a leakage path to ground? 4KV is a lot, so if there was a high
resistance path to ground, some current could flow back to the chassis...
If you remove both leads, can you measure any resistance from the positive
lug to the chassis? Does the meter deflect when you do this?
I would think that if enough current went through
the meter to reverse the
magnet, it would have melted the coil...
Maybe it was reversed by a magnetic field rather than
a current through the coil. The fridge in my
daughter's house became magnetized after the house was
hit by lightning.
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