On 6/20/23 22:51, EV@TucsonEV via EV wrote:
AC Level 2 208 to 240 V AC, 1-phase ? 80 A Per NEC 625
"240 volt" power really has an acceptable range of voltage from 228 volts to 252. (My home regularly sits at 245 volts).
But yes, pulling from one leg of a 3 phase at 277 volts is too much for a "240" volt circuit, although a lot of hardware will "work" at slightly higher voltages...until it doesn't.
Since the Tesla destination chargers are designed to only work with Teslas, which are presumably all designed to work at higher voltages when charging, the problem appears to be people selling and marketing NCAS -> J1772 adapters that do not detect this over voltage condition and refuse to pass through the over-voltage or at least have a warning light of some sort and educate the user about what it means so they can determine if their vehicle can handle the extra voltage.
[I assume the NCAS standard allows 277 volt AC charging...since the installation manual shows it being set up that way....]
Jay _______________________________________________ Address messages to ev@lists.evdl.org No other addresses in TO and CC fields HELP: http://www.evdl.org/help/
