The Avcon connector is as specified in SAE J1772-2001.
The standard inlet is capable of AC Level 1 and 2 charging and is required to
support only 4 out of 9 possible contacts:
Contact #1 (4.6mm dia): charger 1 (AC hot or Neutral in the case of Level 1
(120VAC))
Contact #2 (4.6mm dia): charger 2 (AC hot)
Contact #5 (8.0mm dia): chassis ground
Contact #6 (3.1mm dia): control pilot
As (Cor, I believe) already stated, the Avcon connector system implements
proximity via a reed switch and magnet; the reed switch is in the vehicle-side
inlet while the magnet is in the EVSE paddle.
I suspect that the second small (green?) wire is connected to contact #9 (3.1mm
dia), which is the ground connection for the optional communication lines
(contacts #7 & 8).
Contacts #1 and 2 are in the middle of the row; contact #6 is immediately
adjacent to contact #1; contact #9 is at the outside end of the row (unused
contact #8 separates contact #9 from contact #2):
-4 9 - communication ground (optional)
-4 8 -
2 - AC hot
chassis gnd -5
1 - AC hot or neutral
-3 6 - control pilot
-3 7 -
Hope this helps,
Roger.
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