Ok, I thought that might be the case. The RV pedestal should have ground but I need the EVSE to not see it except through the two 100kohm resistors until the EVSE finishes its POST. This will set the pilot signal to 20A. After that I can connect the ground wire. I will try to find a TT-30P I can install a switch in to switch the ground wire. This will allow me to charge my Kia Soul EV at 20A from 120V. If I can't find something small enough I'll look for an inline switch of some sort. I assume that the ground wire should be the same size as the main conductors with an appropriate switch to go with it. I should probably use a momentary-off switch for safety, too. That way I won't forget to close the switch after the current setting is set.
Thanks, On Tue, Oct 6, 2015 at 11:00 AM, Roland <[email protected]> wrote: > Hello Peter, > > In old installation that use no ground, you can either replace the circuit > breaker with a Ground Fault Type or even install a Ground Fault Receptacle > in the line between the panel circuit breaker and load. > > If either the Line Wire (Hot) or a color conductor which will be black, red > or blue has voltage that is different then the Neutral Wire (White), the the > GFI will detect this unbalance and will open up the circuit. > > In old install, we can according to the NEC, we can install a GFI receptacle > on the first outlet from the circuit breaker on two wire circuits. This > will also protect the other receptacles down the line on this circuit. > > This GFI will still work with out a ground source. You will not be able to > test the receptacle by pushing the RED reset button. > > The only place the Neutral and Ground wire can be connected together is at > the First Main Switch at a Service Entrance. The Neutral and Ground wire > shall remain isolated completely through the circuit until it reaches the > First Disconnect Switch. The ground wire is then connected to a ground rod > only at the Service Switch Location. > > Another way is to build the EV with all the incoming AC circuits and Devices > Double Insulated from the EV vehicle. This is what I did with my EV. The > charger is setting in a insulated non-conductive box as well as the > batteries. The EV body is not AC grounded. Only the charger housing is AC > grounded. > > The batteries are disconnected from the charger by a contactor when the > charger is turn off. Also the batteries are disconnected from the motor > controller when the motor controller is shut down. The motor controller is > also place in a non-conductive housing. > > To test out to see if you have complete circuit isolation, turn on the > charger to charged the battery and see if you have any voltage between any > of the battery terminals to the body of the vehicle. My is 0 volts. > > Roland > > ----- Original Message ----- > From: Peter Gabrielsson via EV > To: David Nelson ; Electric Vehicle Discussion List > Sent: Tuesday, October 06, 2015 11:23 AM > Subject: Re: [EVDL] OEM EV charging on 120V with no ground? > > The safety concern is that you have no protection ground so a ground fault > inside the vehicle may result in the body of your vehicle becoming live. > > I've never seen an RV pedestal without ground though? I though that was > required for any outdoor outlets. > > If this is a permanent thing you might want to drive a ground rod next to > the pedestal. > > > > > > On Mon, Oct 5, 2015 at 5:07 PM, David Nelson via EV <[email protected]> > wrote: > >> What are the safety issues of charging an OEM EV on 120V without the >> ground wire connected? I do have an EVSE which will do this if I put >> 100kohm resistors between hot-ground and neutral-ground which is what >> I have to do to charge with my portable-inverter generator. I'm not >> concerned with generator charging but charging from an RV pedestal. >> >> Thanks, >> >> -- >> David D. Nelson >> http://evalbum.com/1328 >> http://www.levforum.com >> _______________________________________________ >> UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub >> http://lists.evdl.org/listinfo.cgi/ev-evdl.org >> Read EVAngel's EV News at http://evdl.org/evln/ >> Please discuss EV drag racing at NEDRA ( >> http://groups.yahoo.com/group/NEDRA) >> >> > > > -- > www.electric-lemon.com > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20151006/351ee14f/attachment.htm> > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Read EVAngel's EV News at http://evdl.org/evln/ > Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA) > -- David D. Nelson http://evalbum.com/1328 http://www.levforum.com _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
