Awl--
How much is acceptable? An amp-probe reveals between 2 and 6 amps, depending on how balanced the load is on each leg of the main panel. I'm hearing that the neutral from the panel is connected to a *steel* cable outside, while the hots are indeed connected to copper conductors. This would explain some current going through ground.
If the water main connection is broken, no noticeable effect in the house--or so it seems.
Mebbe I'll amp-probe some of my neighbors plumbing. :)
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