Sorry to revive an old(er) thread but, after searching, this is the closest thread I could find.
We have been using a RV plug (14-50) with our Roadster UMC for almost 7 years to charge our car but, we had been wanting to change that to something a little more permanent.
So, just a couple of weeks ago we were able to pick up a Tesla High Powered Wall Charger (HPWC) and I changed it over this last weekend.
We used the Step-by-Step Installation Instructions that comes with the HPWC and here’s how I did it:
Unbox the HPWC, remove the sealing cover and cover from the main housing:
1. TURN OFF BREAKER IN PANEL This is the first important step. Do not proceed unless this is done.
2. VERIFY the power was off with voltmeter. This is the second important step. Do not proceed unless this is done.
3. Remove the 14-50, disconnect the gland nut from the J-box, and remove the J-box from the wall.
4. Using the top entry bracket, secure the conduit and feed the wires in.
5. Connect the wires to the coresponding connector on the terminal block.
6. Our 14-50 had a Neutral which was not needed for the HPWC so we wire nutted and taped it out of the way.
7. Feed the pre-installed/connected service wires through the main housing.
8. Attach the main housing to the top entry bracket and connect the service wires to the main housing block. This was the most difficult part of the entire installation. The service wires are what looks like 3 awg so they are resistant to bending and connecting to the block. I had to look through the hole in the bottom of the main housing to get the wires into the block.
9. Set the Operating Current with the Rotary switch (50 amp breaker so we set it to 8 for 40 amp).
10. Set the DIP Switch Position. There have been some reported issues with leaving DIP to ON (up position) so, we set ours to the “Legacy” position (down position).
11. Verify all wiring connections are correct and tightened to specs in the Instructions.
12. Attach the ribbon cable from the main housing to the sealing cover and install it.
13. Turn on power and observe start up LEDs for any errors.
14. Plug in car using @hsharp’s CAN-SR and try charging.