testing dubious grounding

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ebeowulf17

Joined Aug 12, 2014
3,307
Could simply be oxidation on whatever you were attaching your probes to and the "tips" just weren't getting down to bare clean metal..
Or it could be loose connections or even a long ground wire run between each..
All good points. My gut feeling is that it was a really, really long run. We were in the middle of a fairly large convention center floor and they run temporary SJO/SOO cord (or something similar) from who-knows-where to get power to us.
 
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