The J1772 SAE Specifications state -
5.1 Electrical Ratings
Table 9 - AC charging electrical ratings (North America)
Charge Method Nominal Supply Voltage Max Current Branch Circuit
Breaker
(V) (Amps-continuous)
rating (Amps)
AC Level 1 120 V AC, 1-phase 12 A
15 A (min)
120 V AC, 1-phase 16 A
20 A
AC Level 2 208 to 240 V AC, 1-phase ? 80 A
Per NEC 625
So if in fact there are EVSE's with 277VAC, then they are out of spec with the
J1772 Specifications.
Best regards,
Rush Dougherty
TucsonEV
www.TucsonEV.com
> -----Original Message-----
> From: EV <[email protected]> On Behalf Of John Lussmyer via EV
> Sent: Tuesday, June 20, 2023 7:23 PM
> To: (-Phil-) via EV <[email protected]>
> Cc: John Lussmyer <[email protected]>
> Subject: Re: [EVDL] EV Digest, Vol 128, Issue 17
>
> I've run into some J1772 stations that are 277V. (at least, that's what my
voltage
> monitor said.)
>
> On 6/20/2023 6:32 PM, (-Phil-) via EV wrote:
> > I've also warned about using Tesla destination chargers, as some are
> > hooked to 1 leg of 480 3-phase wye, which is 277V nominal which most EVs
will not
> > tolerate. For example, a Leaf will blow it's on-board charger. Teslas
> > are rated up to 300VAC. Most others top out at 264VAC. There is no
> > good way to tell before you plug your non-Tesla EV in and there's
> > smoke and you are stuck!
> >
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