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-   -   GFCI tester shows hot/ground reversed, then not reversed (http://www.diychatroom.com/f18/gfci-tester-shows-hot-ground-reversed-then-not-reversed-94397/)

bw777 02-03-2011 08:15 AM

GFCI tester shows hot/ground reversed, then not reversed
 
I just bought a GE 50957 GFCI receptacle tester.

http://www.amazon.com/50957-Tester-I...ef=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.

wirenut1110 02-03-2011 08:57 AM

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

TimPa 02-03-2011 10:13 AM

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.

bw777 02-03-2011 11:49 AM

1 Attachment(s)
Quote:

Originally Posted by wirenut1110 (Post 583813)
I believe when those testers show hot/ground reversed, it's an open neutral. Sounds like you may have a loose neutral connection.

There is a different code for open neutral. But I have not checked for a loose neutral yet.

bw777 02-03-2011 11:53 AM

Quote:

Originally Posted by TimPa (Post 583861)
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.

Saturday Cowboy 02-04-2011 08:17 AM

Quote:

Originally Posted by TimPa (Post 583861)
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.

TimPa 02-04-2011 08:47 AM

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.

brric 02-04-2011 09:16 AM

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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