daveo4EV
Well-Known Member
- First Name
- David
- Joined
- Jan 28, 2019
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- 160
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- 5,793
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- Location
- Santa Cruz
- Vehicles
- Cayenne Hybrid, 911(s) GT3/Convertable
- Thread starter
- #61
@Vim Schrotnock I don’t know “how“ the neutral would be used for anything related to vehicle - the J-1772 specfication only has 5 “counductors” at the plug - if you look closely there are only 5 actual connections inside the plug
2 high voltage AC connectors
2 low voltage pilot-pins (dc communcation?)
1 ground connector
given than EVSE is nothing more than a relay (a giant switch) with some minor signally electronics to communicate with the vehicle…
_IF_ an EVSE was going to use the neutral wire from the NEMA 14-50 plug - there is _NO_ physical wire for it in the actual J-1772 plug with 240 volts because the high voltage pins are both “hot” - and pilot pins are low voltage in the specification…
also _any_ EVSE that supports modular adapter cables (like the Porsche one and Tesla) allow you plug the same EVSE into either a 14-50R or 6-50R plug - one of those plugs has a neutral and the other doesn’t - so the EVSE clearly functions with the absense of a neutral when using the manufacture’s provided adpter/supply-cable…
I welcome any evidence of any EVSE supporting the J-1772 standard requireing or using the netrual - but first you’ll have to tell me which of the 5 connecting pins shown below is the Neutral with used with a 240 volt source…
2 high voltage AC connectors
2 low voltage pilot-pins (dc communcation?)
1 ground connector
given than EVSE is nothing more than a relay (a giant switch) with some minor signally electronics to communicate with the vehicle…
_IF_ an EVSE was going to use the neutral wire from the NEMA 14-50 plug - there is _NO_ physical wire for it in the actual J-1772 plug with 240 volts because the high voltage pins are both “hot” - and pilot pins are low voltage in the specification…
also _any_ EVSE that supports modular adapter cables (like the Porsche one and Tesla) allow you plug the same EVSE into either a 14-50R or 6-50R plug - one of those plugs has a neutral and the other doesn’t - so the EVSE clearly functions with the absense of a neutral when using the manufacture’s provided adpter/supply-cable…
I welcome any evidence of any EVSE supporting the J-1772 standard requireing or using the netrual - but first you’ll have to tell me which of the 5 connecting pins shown below is the Neutral with used with a 240 volt source…
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