I recently noticed something surprising about the Nissan Model #296900 portable 240/120VAC EVSE that came with my 2018SV LEAF: its snap-on L1 adapter for tapping into a regular 120VAC household plug isn't fully mechanically keyed. It will attach in either of two ways; there is no control over whether the NEMA 14-50's ground and common connections get swapped or not. With all the fancy status lights on the EVSE, I would've expected all sorts of built-in fault checking features, to ensure it's plugged into a good outlet before charging can commence. How can it not care whether ground and common are swapped??? The only thing I can guess is that there's no connection at all to either of those lines. But if there is no connection, what would keep the metal skin of the car from being elevated to mains potential if one of the J1772 hot leads came adrift and shorted to chassis?? Have I gone full Emily Litella here?