Ok, I'm back, finally getting started on this. The more I look for parts around work the more upset I am at myself for not doing this before now, haha. I possibly have nearly everything I need, for free, from work. I do have some questions...
1) I found a really nice 10AWG/4 wire at work, waterproof, somewhere between 6 and 7 feet in length, would 10AWG be more difficult to work with over the smaller 12AWG? Unlike the indestrutibles, and more like OP's, I plan to remove the original cord all together. I don't have a problem with going and buying some 12/4 I just would like to use this 10/4 that I found at work for free if possible. If it will be more difficult to work with, no biggie, I'll run and pick some up.
2) Why Nema L14-30? Just because it is what you needed to work with your existing clothes dryer? I have found a Nema L14-30 at work, but I think my clothes dryer is different. I didn't initially plan to use my clothes dryer outlet at home, but I don't see why I should not give myself that ability. The distance between it and the charge port on my car is less than 10'. Even though there is a door between the two, I don't see why I shouldn't allow myself that capability if I need it in a pinch. I would just leave the door open and close the laundry room door. I originally intended to use this only at work, in our shop there is an instant electric hot water heater close to where I park in the shop. Just unplug the hot water heater, plug in the EVSE. It is a Nema 10-50 plug, so now my plan is to wire the EVSE to work with my clothes dryer plug at home when I'm in a pinch and need a faster charge (I will have two EVSE's, a 110v and this 220v).
3) Tied to question number 2, I need to make an adapter, from whatever my clothes dryer is to the Nema 10-50 plug. I'm confused though, it doesn't look like the Nema 10-50 uses a ground, just neutral and the two hot's. Is that even going to work? When I wire it up, do I even wire the ground at all to the female (whatever my clothes dryer is) side?
If my clothes dryer is not a Nema 14-50 (I think it might be), then I would also want to make an adapter for use at campgrounds. My 110v EVSE at home is somewhat permanent, so it would be nice to be able to adapt the converted Leaf EVSE back to 110v for charging at our "weekend" house as well. So essentially I need to make two adapters, possibly 3, from whatever my dryer plug is to Nema 10-50, another to Nema 14-50 and then from whatever my dryer is to 110v.
4) When making adapters, is there a specific minimum length that should be used?
Thanks for the help! I've been getting by with L1 since purchase in late April, early May, nearly 6500 miles. With the winter temps cutting into range, it is becoming more and more difficult to "top off" the car during an 8 hour shift at work. Upgrading to L2 should take care of that, even if its a slower L2.