Yep, I made sure to use well under 1mA for the ground presence detect to avoid upsetting upstream GFI. Same with the built-in GFI test, I made sure to *not* introduce any ground fault current externally for the internal test. I heard stories that some EV Charger designers made that mistake and had an automatic turn-off feature instead of a ground fault test. Also, I only used a 4mA actual current to test the 20mA GFI, simply by having 5 loops of the test wire through the GFI Current Transformer, adding up to 20mA in effect. Cor.
On Tue, Mar 12, 2024 at 9:59 AM Ken Olum via EV <ev@lists.evdl.org> wrote: > > Tesla chargers are infamous for using too much current in their ground > presence testing, so that they trip the 5mA GFCI units. This leads > people to swap out their GFCIs for regular breakers, so this safety > feature makes them less safe in the end. > > Ken > _______________________________________________ > Address messages to ev@lists.evdl.org > No other addresses in TO and CC fields > HELP: http://www.evdl.org/help/ > _______________________________________________ Address messages to ev@lists.evdl.org No other addresses in TO and CC fields HELP: http://www.evdl.org/help/
