Page 2 of 3

Re: HELP: OEM EVSE tripping outlet's GFCI

Posted: Sun May 01, 2011 8:59 am
by garygid
If the socket (like in the kitchen, batheoom, etc.) requires a GFI, do not change it, just do not try to use it for EVSE charging.

Since many GFIs are too sensitive to work reliably with an EVSE, try to use a NON-GFI socket with the EVSE (of course also properly Grounded), a 3-prong (5-15 or 5-20) socket.

In short, do NOT use a GFI socket.

It is OK to try a GFI socket, and OK to use it IF it works with your EVSE and car, but just realize that it MIGHT not work reliably (as you experienced).

Re: HELP: OEM EVSE tripping outlet's GFCI

Posted: Sun May 01, 2011 9:03 am
by Bassman
It sounds like your GFCI is too sensitive. A non-GFCI outlet is recommended for most EVSE and when you get the modified L1, you'll most likely need a non GFCI 240 volt outlet also. ;) Phil, Chime in anytime.

Re: HELP: OEM EVSE tripping outlet's GFCI

Posted: Sun May 01, 2011 9:34 am
by wwhitney
garygid wrote: Since many GFIs are too sensitive to work reliably with an EVSE, try to use a NON-GFI socket with the EVSE (of course also properly Grounded), a 3-prong (5-15 or 5-20) socket.
While I have heard this before and it is possible, I am dubious because I can't really think of a good reason the EVSE should be leaking current to ground.

To the OP: to eliminate the extension cord as the problem, try running your compressor on the extension cord to see if it pops the GFCI. Most likely, if the GFCI is from 1989, it is subject to false trips due to electrical noise from certain loads. A modern GFCI would hopefully be more robust. Or else the extension cord or the OEM EVSE is in fact faulty.

Cheers, Wayne

Re: HELP: OEM EVSE tripping outlet's GFCI

Posted: Sun May 01, 2011 9:36 am
by DarkStar
I've been testing my modified EVSE on a variety of GFCI outlets and have never experienced a trip. At most locations I'm using 25 feet of extension cord. Go buy an outlet tester (http://amzn.com/B002LZTKIU) and make sure they're connected up properly.

Re: HELP: OEM EVSE tripping outlet's GFCI

Posted: Sun May 01, 2011 10:13 am
by garygid
It is not the EVSE itself that causes the GFI trips, it is the car's charger that can use the power a bit erratically (filling/discharging capacitors, I expect).

Re: HELP: OEM EVSE tripping outlet's GFCI

Posted: Sun May 01, 2011 11:08 am
by DaveinOlyWA
The trip circuit is spring loaded and wears out causing circuit trips at less than rated voltages. I would try replacing outlet first. They only cost like $10

Re: HELP: OEM EVSE tripping outlet's GFCI

Posted: Sun May 01, 2011 11:54 am
by gbarry42
Better yet, when the EVSE comes back, you'll know for sure that it has no issues. Might be a good idea to include a note that says to check it before they convert it.

Re: HELP: OEM EVSE tripping outlet's GFCI

Posted: Sun May 01, 2011 8:13 pm
by aqn
garygid wrote: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.
FWIW, I turned off the outlet' breaker and opened it up: it is grounded. Or rather, there is a bare copper wire screwed into the outlet's ground screw; I did not verify where the other end of the wire goes, or checked for continuity between it and, say, the outlet's box.

I think I will get an outlet tester per DarkStar and test the outlet's sockets to see what's up, just out of curiosity.

Re: HELP: OEM EVSE tripping outlet's GFCI

Posted: Sun May 01, 2011 9:07 pm
by DarkStar
aqn wrote:I think I will get an outlet tester per DarkStar and test the outlet's sockets to see what's up, just out of curiosity.
I have one in my adapter bag with an extension cord that is 50 feet of 10-3 and a voltmeter. Never leave home without it! :D

Re: HELP: OEM EVSE tripping outlet's GFCI

Posted: Sun May 01, 2011 9:32 pm
by mgoleta
I have only had my car a week and half. I am only using L1 charging. I plug into a standard GFCI at both home at and at work without an extension cord and have never had a single circuit trip (out of about 15 charge cycles, charge durations from 1hr to 10 hrs). I just got my Leviton lighted GFCI outlet and will be installing them at both work and at home ( I like being able to see the outlet in the dark.) If you a relatively recent GFCI outlet or breaker (and not shared with other devices, ie a dedicated outlet and breaker) I would not expect that there would be an issue if your wiring is good. If you still have the problem without the use of an extension cord it may be worthwhile having your wiring looked at by a professional. If the problem goes away without the extension cord and you really need one, get a different cord. It is not worthwhile skimping on he extension cord.