Mark Lloyd wrote:

Open neutral. Induced voltage.

That would definitely explain zero voltages when breaker is off. And if
I short neutral and ground there's only 0.06 mA flowing.

So: given the induced voltages and wire guage is it possible to figure
out approximately how far back is the break in the neutral wire?

I removed the receptacle and am making all readings with the bare
wires.

Thanks for all the fast responses!

-T