Originally Posted by gwoloshyn
Actually, it was wet drywall mud contacting a hot on one of the outlets on the opposite side of the room. Current passed right through the metal strip on my corner tape.
I cleaned off the outlet and no more problem. Lesson learned..
So wet drywall compound conducts electricity? I'll have to file that one away for future use. And the next day when the compound was dry the problem would have disappeared. . .
With this new information, my guess is then that the breaker would not have tripped with the strip grounded because the current would have been in the mA range but more than 1 mA because with less you would not have felt a shock.
And with the breaker off, an ohmmeter might have shown some resistance between this corner bead and the breaker's terminal.
Good problem, good job. . .