Originally Posted By: jpope
This post was automatically imported from our archived forum.
On my morning inspection today, my “three light outlet tester” showed reverse polarity in a GFCI outlet located in the garage. I noted this in my report and moved on.
Further into the inspection, I plugged into another GFCI outlet, pushed the test button on my tester, the GFCI tripped, I pushed the reset button on the outlet and when it powered back up, my tester showed reverse polarity ![eusa_think.gif](upload://lNFeGuTetUAtwNVgUSOuUzgrGGK.gif)
The test button on my tester would not trip the GFCI while it was indicating reverse polarity. I pushed the test button on the outlet and then reset it. It powered up and my tester showed a normal status.
I tripped it again with my tester and when it was reset, it was reversed again.
For whatever reason, every time I tripped the GFCI with my tester, the outlet would show reversed polarity when it was reset.
Needless to say, I reset the GFCI and left it alone. Perplexed, I went back to the garage GFCI and pushed the test button on the outlet. When I reset it, it show all systems normal.
Without telling me to throw away my "three light testers," can someone explain this?
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