Sage Brush posted a link from Idaho Labs that showed the Leaf will pull a max of around 30 amps on a 208 volt circuit. Most commercial buildings run 120/208Y 3 phase while most homes will be 120/240 single phase. The 120 side of things is no different, but the higher voltage (either 208 or 240) is. Almost anything that runs on 240 will run on 208 with a little reduction in output. Some motors are picky, but most other loads don't care. The EVSE is one that doesn't care. There can be all kinds of three phase, but for light commercial 120/208Y is the most common.
We have had a problem where someone had set the adjustable EVSE to 30 amps on a 30 amp circuit and had it shut off on them, and worked fine when it was set to 24 amps (which is the correct setting for a 30 amp branch circuit).
My car came with the Nissan 120 volt unit and a Primecom adjustable 240 volt unit. While I will not be an advertisement for them, I will say it works well for me.
With my experience over the last several months of owning/ charging, I would recommend if you are going to buy an EVSE, you buy on that is adjustable. They aren't that much more expensive, and if your situation changes, allows more adaptation than a fixed rate EVSE can. That way if you suddenly find you need to charge off a 30 or even lower amp circuit you can properly. I also find that it allows for "fine tuning" of charge amounts when trying to charge to less than 100%. At full 27.5 amps the timer steps in minutes, when compared to percent of charge, is a lot larger than at say 16 amps.