Mark, Modern EVSE do not use the Neutral, but early EVSE did for their control circuit power, because a 120V power supply was cheaper and easier to find than a 240V supply. Today all EVSE use a multi-voltage switch mode power supply, but just to illustrate: the first version of the Leaf convenience charger had a 120V transformer (!) inside to generate about 15V for the control system and pilot signal. I know, because I converted a few using a small switching multi-voltage supply to be able to run them from a 240V outlet.
On Tue, Mar 12, 2024 at 1:29 PM Mark Hanson via EV <ev@lists.evdl.org> wrote: > > Hi folks > Not to stir up another firestorm again - but I was curious why a 14/50 240V > socket was chosen for portable EVSE charge controllers when they *don’t* use > the neutral wire? The NEMA 6-50 sockets without a neutral would seem more > appropriate but aren’t used that often and would need a 6-50 to 14/50 adapter. > The Enphase (microinverters) solar ground mount arrays we traditionally > install in our volunteer solar club tend to be about 100’ away from the > house, so running an additional #6 neutral adds cost but of course required > by code as we do for courtesy 120V 20A or 14/50 50A breakers in the remote > combiner box (or sub panel breaker box at solar array). > Best regards > Mark > 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/
