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aqn
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HELP: OEM EVSE tripping outlet's GFCI

Sat Apr 30, 2011 9:32 pm

So I picked up my LEAF today :D, drove around a whole bunch, came home, plugged the car into an 120V outlet (with GFCI) in the garage to charge. The EVSE's charge light would go on, but within less than a minute, the GFCI would trip :( . This happens consistently. Should that be happening?

More info:
* My house was built around 1989.
* I have a compressor (Campbell-Hausfeld VT6316) plugged into the wall plate's other outlet. The compressor's label reads: "wired for 120V / 15A / 60 Hz / 1PH". I have used the compressor many many years without it tripping the GFCI. For example, when the compressor's tank is empty, to fill it up to use pressure (usually 100 psi), the compressor would have to run at least five minutes. It seems to me that if the outlet can support 15 amps for that long, why would the OEM EVSE trip the GFCI after less than a minute? (I even tried unplugging the compressor and plugging the OEM EVSE into its outlet: same result.)
* I am using a 50-feet 12-gauge grounded extension cord between the outlet and the OEM EVSE. Can the cord's length be causing this problem?

What is the likelihood that there is something wrong with my OEM EVSE? With my outlet? Thanks for any clues.
Anna Nguyen

Glenn
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Re: HELP: OEM EVSE tripping outlet's GFCI

Sat Apr 30, 2011 10:03 pm

aqn wrote:* I am using a 50-feet 12-gauge grounded extension cord between the outlet and the OEM EVSE. Can the cord's length be causing this problem?
I never stayed at a Holiday Inn Express, but I'm willing to bet a bundle that you self-diagnosed your problem...

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garygid
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Re: HELP: OEM EVSE tripping outlet's GFCI

Sat Apr 30, 2011 10:42 pm

Often/sometimes/occasionally the GFI in standard sockets is too sensitive for use with the EVSE. The EVSE includes a less-sensitive GFI.

Try a non-GFI outlet.
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Re: HELP: OEM EVSE tripping outlet's GFCI

Sat Apr 30, 2011 11:30 pm

I used mine on a GFCI outlet a few times and it was fine, though it did pop prematurely once... You could try replacing the GFCI outlet with a newer model. Yours may be too sensitive.

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gbarry42
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Re: HELP: OEM EVSE tripping outlet's GFCI

Sat Apr 30, 2011 11:43 pm

aqn wrote: It seems to me that if the outlet can support 15 amps for that long, why would the OEM EVSE trip the GFCI after less than a minute?
A ground fault involves detecting the presence of a small leakage current. The amount of current the outlet can supply has nothing to do with this. Try another extension cord if possible (only because that's the only easy thing you can try). The EVSE could be faulty, as could the car. But my vote goes with the others--it's usually the outlet itself being too sensitive.
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davewill
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Re: HELP: OEM EVSE tripping outlet's GFCI

Sat Apr 30, 2011 11:48 pm

If at all possible try to eliminate the extension cord, at least for a test. Then at least you'll know whether it's the EVSE or not.
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linkim
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Re: HELP: OEM EVSE tripping outlet's GFCI

Sun May 01, 2011 6:46 am

garygid wrote: Try a non-GFI outlet.
I tried a non-GFI outlet (3-prong outlet) in my garage and the EVSE didn't work. However, when the Blink was installed, the electrician said there was no ground even though it appeared to be a grounded circuit. It did work on the GFCI circuit but I had to use an extension cord from the kitchen to the garage.
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garygid
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Re: HELP: OEM EVSE tripping outlet's GFCI

Sun May 01, 2011 7:23 am

The L1 EVSE requires a Ground, or it will refuse to work.

Get your sockets properly Grounded.

If the only grounded socket that is available (even with a heavy-duty extension cord) is the GFI socket, consider having that socket replaced with a properly-grounded non-GFI socket.
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linkim
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Re: HELP: OEM EVSE tripping outlet's GFCI

Sun May 01, 2011 8:45 am

garygid wrote:If the only grounded socket that is available (even with a heavy-duty extension cord) is the GFI socket, consider having that socket replaced with a properly-grounded non-GFI socket.
Sorry, I don't understand what you are saying. The current GFI outlet I used for L1 charging (now have Blink installed) is in the kitchen, which is required by code. Why would you suggest it be replaced by grounded non-GFI? I agree the the outlet in the garage needs to be upgraded to a grounded GFI circuit for L1 charging of my LEAF.

In any case, thanks for your many suggestions/observations to the forum which have helped me to better understand the LEAF.
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aqn
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Re: HELP: OEM EVSE tripping outlet's GFCI

Sun May 01, 2011 8:54 am

Thanks for all the clues so far.

I tried plugging directly into the GFCI outlet: same result. (I verified that the outlets are on a 20-amp breaker.)
I tried plugging directly into another GFCI outlet (outside outlets, on a different 20-amp braker): same result.
I tried plugging it into the washer's outlet (20-amp, non-GFCI; or rather, there is no GFCI test/reset button on it), just inside the garage, via the same 50-feet 12-gauge extension cord: it's charging fine!

In any case, since I'm sending off the OEM EVSE to evseupgrade.com to get it upgraded, and will have an electrician come & install a 240V outlet in my garage, this is not a pressing/do-or-die problem.
Anna Nguyen

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