L1 and L2 mean Live1 and Live2. You just treat GND as Ground, the same as anywhere, and use L and N the same way that Americans would use L1 and L2.
Is your question about relay and relay test answered by Step 4 in this guide: http://openevse.dozuki.com/Guide/OpenEVSE+50A+Charging+Station/8?lang=en
what about GFCI - hot and N will do?
level2 is not equal to line2.what is the question about then?
If I understand correctly, the question is how to connect the mains electricity given 240V with Live, Neutral, and Ground (rather than the American L1, L2, Neutral, and Ground). Is that correct Yoav? The answer, if I understand correctly, is to connect international L and N as one would connect American L1 and L2 (and of course ground is still ground).
I'm still a prospective customer with no experience doing this exactly (but I do have experience living in several different countries with different electricity supplies). I'm assuming (from having read the build guide) that the American Neutral mains lead does not need to be connected anywhere i.e. that the openEVSE does not need 115V. Is this assumption correct?
There is no issue switching both L and N, in fact it is required by the standards. Ground and Neutral are only allowed to be bonded in the Panel, so there is no possibility of ground flow issues.
OpenEVSE can be connected in any way L - L, L - N, or N - L.
The wiring rules look like they apply to the electrical system.
Are you sure they apply to appliances as well? If so every charging station in production fails to meet those rules as it is standard to switch both the hot and return.
The rules make since in the context of the structured building wiring, as you may have Neutral tied to Ground in several panels within a building. However as an end device where you have separate Neutral/Ground conductors and it is prohibited to tie the them together anywhere except the panel, there is no chance for strange current flow issues. It really does not matter which opens first.