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Most if not all of the public chademo units are 480v 3 phase powered in the US. 3 phase 240 and 208 are probably available for convenience. If you have 480 or whatever is common in Canada maybe 380v? Use that for rapid chargers.
What's providing the power?
Probably start there. Mainly what's the voltage?
Then if it's not a big enough transformer, service feeder, or enough remaining capacity to tie into there may be no point in running an mcm size wire.
I have learned more about the j1772 protocol. It appears that it can change on the fly in 1 or 2 amp steps from 6 to 70 amps. The pilot signal can chang and direct the car to draw less power. But I do not know of any j1772 setups that talk to each other like that to limit the amps on the feeder, but it appears possible and as if that were the intent of the design.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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