Yes, the 12" restriction is because all EVSEs are required to have integral GFCI protection, but of course this will do no good for wiring "before" the EVSE, so they mandate this cable is as short as possible. EVSEs are used in mechanically hostile environments, so it's likely that a certain percentage of EVSEs will get mechanical damage to the insulation on their cords. If that cord was before the integral GFCI, there would be no protection, in addition, the cable from the EVSE to the car is electrically dead until the handshake from the car is completed, so the likelihood of getting shocked or electrocuted is much lower. Not so with the cable from the wall to the EVSE itself.
On Fri, Apr 12, 2024 at 8:05 AM Tom Keenan via EV <ev@lists.evdl.org> wrote: > NEC article 625.17 has a mention that the input cord length shall not > exceed 12” if the personnel protection system (GFI?) is located in the EVSE > enclosure. > That appears to be an ‘out’ for needing a GFI breaker? Just speculation. > Tom Keenan > > > On Apr 12, 2024, at 7:14 AM, Mark Hanson via EV <ev@lists.evdl.org> > wrote: > > > > Hi folks > > When reading the 2020 NEC for a master electrician exam, I noticed > 210.8(B) says that 50A and below must now have a GFCI breaker at the panel > that Tesla etc says will cause nuisance trips (see article). 625.54 in the > EV section further states “All receptacles for EV charging shall have GFCI > protection. The article states that hardwired EVSE gets around this > requirement since the GFCI is contained but I don’t see that in the code > book. Anyway I have not installed GFCI protection on EVSE circuits and > don’t know of electricians here that have since it causes nuisance trips. > The code looks like using a 60A breaker is a loophole to get around this > requirement as the Tesla EVSE installation manual recommends (and the fact > that Teslas can draw up to 48A instead if the typical 30A others use). > > Say does anyone know why there’s a 12” cord limit on portable EVSE? > That seems silly unless they’re afraid it might lay on the floor in a water > puddle. > > Best regards Mark > > https://www.seahurst.com/nema-14-50/ > > > > Sent from my iPhone > > _______________________________________________ > > 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/ > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20240412/a3c41863/attachment.htm> _______________________________________________ Address messages to ev@lists.evdl.org No other addresses in TO and CC fields HELP: http://www.evdl.org/help/
