Author Topic: Small appliance tripping the GFCI; is it the appliance or the wiring?  (Read 13081 times)

ohsnap

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We have a home with 1970s aluminum wiring.  We had some electrical work done a year ago, and the electrician "pigtailed" all of the wiring with copper wiring at the new outlets but didn't otherwise make changes.

We had a well-used espresso machine that began leaking a few months ago, then it started tripping the GFCI every time we turned it on.  We decided that it was past its useful life (not worth attempting to repair the leak and now an apparent short) so we tossed it.  We began using an identical (also well-used) machine which has worked fine the last few months, but it has suddenly started tripping the GFCI.  So now I'm wondering if it's the machine or the wiring.  With trepidation, I plugged it into a non-GFCI connected outlet in the dining room and it worked fine.  So that would seem to indicate that the machine is OK. We are using other appliances in the kitchen GFCI connected outlets without a problem (coffee maker, grinder, toaster oven, blender), so that would seem to indicate that the outlets are OK...so which is it??

I really want to use my espresso maker and keeping it on the dining room table isn't a great option.  Do I have to call an electrician to figure this out?

Fishindude

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Re: Small appliance tripping the GFCI; is it the appliance or the wiring?
« Reply #1 on: August 24, 2016, 11:42:41 AM »
I have had similar experience.   
Older kitchens did not have near the electrical demands of today and it is not uncommon to have 3 or 4 outlets on a single breaker.    Start running the coffee maker, toaster and electric skillet all at the same time and you start popping breakers.  Have an electrician rewire things so only one or two outlets per breaker.

ncornilsen

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Re: Small appliance tripping the GFCI; is it the appliance or the wiring?
« Reply #2 on: August 24, 2016, 12:21:26 PM »
Sometimes things with electric motors, such as mixers and blenders, seem to trip GFCI outlets. I'm not sure why though.

johnny847

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Re: Small appliance tripping the GFCI; is it the appliance or the wiring?
« Reply #3 on: August 24, 2016, 12:26:16 PM »
Sometimes things with electric motors, such as mixers and blenders, seem to trip GFCI outlets. I'm not sure why though.

Yup. Inductive loads are problematic for GFCI outlets.

However, an espresso maker shouldn't be an inductive load.

guitar_stitch

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Re: Small appliance tripping the GFCI; is it the appliance or the wiring?
« Reply #4 on: August 24, 2016, 02:47:55 PM »
GFCI trips when current is detected on the Earth ground to protect the user.

Possible moisture issue inside the machine?
Possible failing GFCI, since you operated the other machine with a leak for a while?


paddedhat

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Re: Small appliance tripping the GFCI; is it the appliance or the wiring?
« Reply #5 on: August 25, 2016, 07:03:50 AM »
Gfci outlet failures are pretty common. They are engineered to " fail safe" to protect the user.  The first step it to take the coffee maker for a walk. Find another gfci receptacle in the kitchen,  bath, or even the garage or exterior of the home. Does the machine trip another outlet? If it did, you found the problem. If not, you need to turn the breaker off that feeds the  outlet, unscrew the outlet from the box and gently pull it out. Are all the connections tight? Are the tails added to the aluminum wire still firmly attached? If everything looks good, it's a good bet that the outlet has failed. With the power off, it's pretty simple to install a new one. Good luck.