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Discussion Starter #1
I just bought a GE 50957 GFCI receptacle tester.

http://www.amazon.com/50957-Tester-Installation-Operation-110-125V/dp/B002LZTKIU/ref=pd_sim_hi_2

I tested several receptacles last night, both GFCI and non-GFCI, all checked out ok.

This morning I checked a receptacle that is GFCI protected (downstream from a GFCI receptacle), and the tester indicated that hot and ground were reversed. I pressed the test button, and the circuit went dead as expected. I then reset the GFCI and now all receptacles on the circuit show normal.

How could the hot and ground test reversed, then not reversed?

Thanks.
 

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Electrical Contractor
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I believe when those testers show hot/ground reversed, it's an open neutral. Sounds like you may have a loose neutral connection.
 

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That tester has 2 functions -
one is a recptacle tester, testing the for proper wiring: hot, neutra,l and ground wires, and their respective locations. it also tests the availability of the proper voltage. the led's show status.

second is a gfci tester. when the button is depressed, it install a resistance between hot and ground so that a small amount of current passes to the ground conductor (this is a ground fault, or short) which should activate the gfci reseptacle/circuit and trip it. resetting the gfci braker is then required. i don't think it is recommended to push the button on non-gfci protected circuits, which is where you're problem may be.
 

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Discussion Starter #5 (Edited)
i don't think it is recommended to push the button on non-gfci protected circuits, which is where you're problem may be.
I tested a non-GFCI receptacle, pushed the button, then tested the receptacle that showed hot/ground reversed this morning, and it tested ok.

There is a freezer on the gfci circuit, in the basement. Maybe it was running or started up when I was testing this morning and caused the reverse test?

Edit - I just read the instructions again, and it does say to unplug all appliances on the circuit before testing.
 

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Scared Electrician
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i don't think it is recommended to push the button on non-gfci protected circuits, which is where you're problem may be.
Absolutely no reason not to. It is the only way to check the operation of a protected receptical.
 

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are you implying the gfci test button is also recommended for testing the circuit beaker (operation) in the load panel that is protecting the wire? I guess i have never heard that, so i am curious.
 

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The only way that tester will test a circuit breaker is if the breaker is a GFCI. Using it on a standard circuit will do nothing other than to check for correct wiring.
 
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