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Buzzing tandem GFCI/three-prong outlet

743 views 4 replies 3 participants last post by  LawnGuyLandSparky  
#1 ·
Project #3. We have a tandem GFCI/standard 3-prong outlet in our kitchen. I do not know why. Last year we heard it buzzing and had a handyman replace it when he was out doing other work. A new GFCI was put in, and all four of the outlets worked fine for a while. Then the non-GFCI side would lose connection when we plugged appliances in (a stereo, a coffeemaker, our cell phones).

Now only the GFCI side gives power to plugged-in devices. I've also noticed it makes a buzzing sound. This sound seems to present all the time, and when I push in the TEST button it goes away for a while, but will buzz after a few minutes (I've not measured how long) until I RESET and TEST again.

I'm thinking it's more than just the GFCI itself, and that I need to check for loose wires on the non-GFCI side.

Should I replace the standard side with a GFCI? Note that our house's wiring is mostly original from ~1965 and is paper-sheated, and generally none of our outlets are grounded (ie, almost all of our GFCI outlets have the sticker for "no equipment ground" and when I plug in a powerstrip that has an indicator for grounded line, that indicator does not come on).
 
Discussion starter · #3 ·
The gfci makes the un grounded outlets safe. You either have some loose connections in that box or a bad gfci or both. The non gfco outlets should get their power from the load side of the gfci.
Thanks, I'll check the wiring. Would it make sense to replace the non-gfci outlet next to the gfci outlet with a gfci outlet? And if so, would I wire that load-to-line or line-to-line?