ROBERT via EV wrote: > (1) How does a vehicle with a J1772 connector know the rating of the NEMA > outlet?
The portable J1772 EVSE charging cord/adapter tells the vehicle via the pilot signal how much AC current may be drawn. A 120V J1772 cord will almost certainly tell the vehicle not to draw more than 12A, so that it is safe to use on any 15A or 20A 120V outlet. I believe that some aftermarket cords may be available with a 16A pilot signal or the ability for the user to configure the cord for either 12A or 16A, however, I an unaware of an OEM cord with this capability. > One can buy a J1772 to NEMA > adapter; however, they are not safe to use. All these adapters "fake out" > the EVSE and the user must be aware of the limitations. It would not > surprise me to see these adapters outlawed. I'm not sure what sort of adapter you are thinking of. As far as I know, every OEM that offers an EV with a J1772 charge inlet wither includes or offers a 120V J1772 "opportunity charge" cord. This cord *is* a proper J1772 EVSE and not only provides an appropriate pilot signal to the vehicle, but also does not energise the charging plug until it senses that it is mated with a J1772 receptacle. I can't see how one of these NEMA to J1772 opportunity charge cords can possibly be *less* safe than an ordinary NEMA extension cord between the outlet and a charger on the vehicle. Cheers, Roger. _______________________________________________ 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)
