The connector talk made me wonder if there was a more industrial standard (at least for North America). Come to find out that for EV buses and medium/heavy duty there's J3068, which is still under development, which actually looks like the european type 2 ccs connector.
Funny thing is I only first found out about it via a teslamotorsclub post,
What is a J3068 charger?),
Info is hard to come by but digging through some long presentations I was eventually able to find some info on it (as well as on google:
https://epri.azureedge.net/documents/Day One Presentations June2016.pdf (search for J3068).
One thing the standard is doing is to ensure that the higher 3-phase voltages and currents work with the connector. Max is 160A for a potential max of 160 x 3 x 277 (480y) = ~132kW A/C. Possibly more if you're in Canada. It can also do DC charging ala CCS.
It would be interesting to see what kind of connector they use for the Tesla semi. Given its more commercial application I wonder if they will use this standard vs the Tesla connector.