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Earth Ground testing verifies the ground path included the earth rod, electrical panel, circuit, socket/plug to the station. This is done by intensionally passing a very small current from each hot to ground.
It is possible to get a false positive if the relay is not operating property failing to close on command.
The 4 corner holes are 3 7/8” x 9 1/4”, center-line holes a 9 1/4.
The center holes can be used for static mount by either tightening the screws down so the station can not slide to release or using a screw with a larger head than the release opening.
Yes, it looks like a contributor accidentally removed step 5. We have reverted to the version prior to the edits.
The picture is 3 wire hot hot ground. The white wire had 1 inch or red shrink wrap to indicate it is hot 2.
Cables from OpenEVSE come factory terminated with sleeve ferrules. The wording was changed, “should” is now “must” and we made sure it was clear in both EV cable and input cables require ferrules.
No, none of the internal devices LCD, Relay, coils etc need to be disconnected. Just disconnect the AC power and program.
The thicker wire is one of the three red wires with 1/4 QC terminals pre-crimped. The thin wire goes to the UBEC power supply for WiFi. The ring terminal can be used at the end of the UBEC red wire.
None of the AC connections are polarity sensitive. AC_Test are identical circuits. Just ensure the AC_Line wires connect to the AC Input and AC_Test connects to the load side of the relay.
I personally build with black wires across the bottom of the relay and reds across the top. Same on the board connector blocks black wires on the bottom red above. But again neither is polarity sensitive.
The NEMA 14-50 plug is connected Hot 1, Hot 2 and Ground. For 120v you will need to build an adapter that is wired Hot 1, Hot 2, ground on the 14-50 (neutral is not connected) socket to Hot 1, Neutral, ground on the 120v plug.
OpenEVSE will automatically detect just one hot and set the current to 12A. L1 and L2 current is saved independently.
Step 1 has been updated with the link to the source code and guide for loading the Module. In about a week I will have preloaded modules in the OpenEV store.
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