GFI false trips, but everything checks out. (????)


You most likely have an AFCI (Arc Fault Circuit Interrupter) not a GFCI (Ground Fault Circuit Interrupter) on this circuit. Although it's not impossible that the breaker is bad, I think this is unlikely. It's more likely that there is an arc fault somewhere in the circuit. These can be hard to find, but worth the effort.

I had a similar experience wiring a new receptacle onto a circuit protected with an AFCI, in a relatively new house. After the new receptacle was installed, every time I switched on a steamer plugged into any receptacle on this circuit the AFCI would trip, even with no other loads on the circuit. This nearly drove me crazy until I discovered some paint on the ground conductor under the screw terminal of the wire on the new receptacle. I cleaned the paint off, and the AFCI ceased tripping. That's how sensitive (three cheers for this) AFCIs are to serial and parallel "arc faults", which have been shown to be the cause of the majority of electrical home...

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If the receptacles are in the kitchen and they serve the countertop they are required to be protected by a GFCI. Whether they are within 6' of the sink doesn't matter since around 1987.

Are they all on the same circuit?

You would not need more than two (normally) to feed the two small appliance branch circuits in a kitchen. Then you feed normal receptacles off the load side of the GFCI.

If they are tripping all by themselves without plugging anything in I would suspect they are miswired. Someone fed one GFCI off the load side of another or fed the receptacle itself by the load wires instead the line wires.

Second, you have a pinched hot wire on the load side of some of them causing enough current to leak to ground to trip them.

The third possibility would be they are really junk and should be replaced but even the cheapest GFCI's have worked for me. And since you already had an electrician replace at least one of them and check the other two I...

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I have a GFI receptacle in my kitchen that feeds four other receptacles.

It tripped the other day and I cannot get it to reset. All of the other receptables on the circuit are not functioning which is to be expected. I first thought it was a bad GFI receptacle so I replaced it to no avail.

I then checked power at the electrical panel and all of the breakers for the house appear to be providing power. The breakers for the GFI receptacles in the bathrooms have test buttons on them and trip when it is pressed, however the kitchen GFI breakers are standard non GFI breakers.

The confusing part is that when I go to the GFI receptacle I am not seeing the 120V power on my meter that I am seeing in the other working receptacles in the house and at the electrical panel. I checked both sets of wires coming into the receptacle and various combinations of hot and neutral just to be sure I was testing the correct wires. One pair gives me 3.9V and the other 0.04V.


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I have an outlet just outside my house, runs a little underground through white pvc piping. The one outlet controls two sump pumps. One for my main underground water as my house is built below the water table, the other is for my septic tank.

The outlet has caused a number of problems. Last time it tripped the breaker water back up from my septic and burnt out the wiring.

I pulled the main wiring out and replaced it with my old hot tub wiring. Runs from my main panel of double 15 breakers to a gfi breaker with 40amp in it. The receptacle outlet is 15-20 Amp I believe.

It works for a while then the main pump keeps tripping the GFCI breaker. I plug that pump into an extension cord running from a normal outlet in the house and no problem. I need the outside outlet to constantly work or I have severe water problems in the house.

Most recently a flood in basement of 6 inches of water destroying my water...

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Yessssssss! Thanks for all help folks, the lights are back on (always feels so good to fix it yourself (with the help of some forum friends, of course)).

Switched the breakers around, and all were working fine, so began a receptacle hunt. After checking all the non-working receptacles, it turned out to be a bathroom socket that was still working itself, but the rubber sheathing around the wires had turned brittle and began coming off and the socket itself was burnt and warped (on the inside). Replaced it and everythings working fine now!

While I was at it I checked out other sockets that have had issues for some time now. I found, again, that a working socket was the culprit. It had had one of it's black wires slip out and was causing everything downstream to be non-functional. So now we've got things working that haven't worked for years (or decades?).

Now some things I find odd. A stream of circuits that were out because of a socket are actually on a...

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HOME SitemapInfo and Troubleshooting

There are often special looking electrical receptacles in bathrooms or kitchens that have "Test" and "Reset" buttons -- often black and red -- on them. Video. These are ground-fault circuit interrupters -- GFCIs or GFIs. Their purpose is to protect people from electrocution. They do not prevent shock altogether, only deadly shock. And they do not prevent overloads on the circuit. That is the job of a circuit breaker at the main panel. See my GFCI article. (What is the little light on some GFIs?)

Why Can't I Reset? Is GFCI Bad or Is There a Ground-Fault?
GFI Outlet Diagram -- Hooking Up
Is an Unknown GFCI the Cause of an Outage?
Finding a Tripped GFCI Receptacle
Confusing Terms: GFCI, GFI, Load, etc.

Bad GFCI or a Ground-Fault? -- Troubleshooting

Is a GFI tripping for a ground-fault? If you are pretty sure you need to troubleshoot a ground-fault itself, you may want to go to

Tripped GFI -- Why?


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It could be any of those. Usually when it trips no load, then most likely the problem (barring a bad GFCI) is that there is a GROUND-to-NEUTRAL fault somewhere.

If a cursory inspection of the devices on this circuit don't show anything, the only real way is a divide and conquer. Take the wires out of the GFCI and see if it trips with nothing connected to it (that would surely be the sign of a bad breaker). Reconnect it and try opening the circuit at progressive (or if you're mathematically inclined you can do a binary search) points until you can find when the problem does occur and when it doesn't which should point you to the problem.

However, the time delay with no apparent load isn't the usual sign of a ground fault. That usually indicates a marginal over current or a bad device. Usually I don't recommend people start by replacing the GFCI, but in this case I might.

One more thing... before we get started ... are you sure this is GFCI and not an AFCI? Whole...

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If the outlet cover was held open by the lights it could be wet. A smal amount of water will cause a GFI to trip. A GFI is a device which makes certain that voltage is not draining away from the two wires, to some OTHER voltage drain, such as a human body or a wet circuit. if above not the answer go to your breaker box and find the breaker that controls that circuit. you will know when you have the right one when the breaker does nothing, not even trip it self. see what else is on that circuit {what else turns off when main breaker is tripped and unplug everything that is on that circuit then turn on the main breaker. try the reset with everything else off if it still trips then its the gfi itself. they go bad often on construction sites [my own personal experience] if it resets properly than one of the other things on that circuit is the culprit. replug or turn them on one at a time. the breaker will trip if its one of these. if not replace the breaker. pretty cheap at...

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GFCIs and False Tripping

At SESCOS, we know that a small electrical problem can become a big headache if it isn’t fixed correctly, and in this post we’ll take a look at a common electrical problem to discover why your GFCI keeps tripping and what you can do about it.

What is it?

The GFCI (ground fault circuit interrupter) is there to protect you. When it senses something blocking the electrical current, or a leak in the current, it shuts off the electricity. This is a safety feature. Because the GFCI can detect the tiniest leaks, it shuts off the power to prevent you from getting a nasty shock when you plug something into an outlet.

But sometimes, it trips for no reason, in what electricians call “false tripping” or “phantom tripping.” Why does this happen?

1. You’re Wearing it Out

The wiring is old and wearing out. You’re overloading the current. Multiple devices on the same GFCI are causing it to trip.

The solution? Have a SESCOS...

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I must admit this is my first time implementing shaders, previously I have only worked with fixed function pipeline; however, though I am certain that everything I did is correct - there must be an error.

glLinkProgram(program) - returns GL_FALSE when queried for GL_LINK_STATUS. In addition, the info log is empty (when I query the log length - it is 1, which is the null terminator per the docs, it checks out). So linker errors, and no logs. In addition, I had just discovered that the linker problems occur as soon as I make any use of gl_Position variable in vertex shader, both during assignment and if I use it for calculations. I tried all sorts of shader variations, it errors but it fails to produce the logs - it just seems to return GL_FALSE any time gl_Position is touched. Interestingly enough, fragment shader doesn't cause any problems.

Both fragment and vertex shaders compile fine with no errors. When I introduce syntax errors, they are detected, printed, and the...

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It sounds like you've plugged your fridge into a GFI (ground fault interrupter) outlet.

The National Electrical Code (NEC) article 210.8 A (6) says in dwelling units, only those outlets in a kitchen (I'm assuming your fridge is in the kitchen - right?) "where the receptacles are installed to serve the countertop surfaces" must be provide ground fault protection aka "GFI outlet". Unless your town, city, county or state has laws that supersede the NEC, you should have the outlet changed to a standard, grounded outlet to prevent the nuisance tripping you are experiencing when the cooling compressor is trying to start. A refrigerator is not a counter surface appliance, and therefore does not require GFI protection.

The other outlets are fed from this outlet, so when you connect the fridge to another outlet on the circuit, the same GFI plug trips again. When you replace the GFI plug with a "regular one, the GFI plug should be installed in another outlet to provide the...

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J1772 and Ground Faults

modular EV power LLC Back to Homepage

Ground Faults and J1772 Charging stations

As charging moves from NEMA14-50 receptacles powered by a standard circuit breaker to J1772 connectors with Ground Fault Interrupters some people may find their vehicle causes Ground Faults.

The Ground Fault Interrupter in the J1772 charging stations is just like the ones in your home protecting outlets in the wet rooms and outside your home. Just like those home units occasionally have a device you plug in that they refuse to work with, this can happen to an EV.

Ground Fault Interrupters are a great safety system that removes electrical power if it appears any of that electricity is leaking out of the system. The leaking electricity may be due to a component failure, wet parts, or a person touched an energized part and is at risk. The system is very sensitive so that power is removed before a person can be injured.

Simple electrical...

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My Exchange 2007 box (transport,mailboxes) has GFI MailEssentials running on it. The logs are filled with emails like these (like every 1 second):



Subject: N/A

Now, I do have an Exchange 2010 server in my org., but it's not hosting any mailboxes, nor it's part of a public folder replication. I plan on moving mailboxes from 2007 to 2010 and then demote my 2007. But right now I just can't figure out what is going on with these emails, what are they for. GFI's tech support say it's out of their scope. Exchange antispam agents are disabled on my 2007 box. The agentlogs don't show these emails, only GFI's logs. All Queues are empty, and no pending NDRs are visible. Restarting the Exchange Transport service seems to fix the issue for a while, then it comes back.


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by Anonymous

I have a 2003 Flagstaff 23 fbs trailer

All electrical appliances are turned off.

Plug into house electrical outlet and trips house GFCI. Works fine when plugged into campground outlet. I read somewhere that the problem is trailer electrical ground.

Where is the ground? On the tongue, electrical box? Camperland want mucho dollars just to diagnose problem.

ANSWER: Greetings thanks for submitting your question on our Ask An RV Question Page.

You are correct in stating that a bad ground or even reversed polarity in your travel trailer could be tripping the

GFCI Receptacle

. GFCI Receptacles look like normal 15/20 amp plugs except that they have a built in circuit breaker. The GFCI plugs are very sensitive to bad grounds and reverse polarity in electrical systems. They will blow when a normal circuit breaker will not.

First I normally do not recommend that a do-it-yourselfer mess...

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Thank you, Harold! Yes, whoever wired the kitchen line wasn't professional. As far as I understand, fridge, dishwasher and garbage disposal should at least be upstream of GFCI outlets, if they happened to be on the same circuit.

The circuit (at the in-laws' house) has been working normally for years until about two weeks ago when the GFCI outlet tripped. I reset it then and it had stayed on for two weeks until tonight when it tripped again. Only this time it stayed on only for a minute or so.

I replaced one GFCI outlet with a new one, then found that the frigde outlet, the one downstream of the replaced GFCI, is also a GFCI. Replaced it with a used GFCI. This new combination kept tripping too for half an hour or so with no appliances connected and then stopped tripping. I connected all the appliances and they stayed on for a while before I left. Will see what happens tomorrow.

The lights are not affected by tripping, but turned off with the same breaker in the...

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I have already completed that procedure prior to requesting advice on just To clarify, here is what I have currently done to troubleshoot.

have already traced the circuit back to the panel. At the panel I run from a 15 Amp breaker to a receptacle (R1) that serves my television power strip (only cable box and tv plugged into strip). From the receptacle (R1) the critcuit splits. One leg to my GFCI (GFCI 1) "line side" and the other to another receptacle.

I have already confirmed that the tripping is not cause by an appliance on the load side as I have isolated GFCI1 by disconnecting


from the load side and removing all appliances on GFCI1. The intermittent tripping still occurs under this condition which exemplies zero load on the GFCI.

I am inclined to think the problem lies in between the Panel and the "line" side of the GFCI. I have confirmed that the wiring in receptacle R1 (between the panel and the GFCI) is correct via a circuit...

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