That still didn't explain anything. Surely the car could limit itself to 80% of standard socket rated output for continuous draw, like they do in other countries. Are Norwegian outlets commonly installed so far below spec that that will cause them to catch fire? What was the impetus for this regulation?

I don’t know exactly for Norway as that was the best English article I could find. A standard danish outlet (they are crap) is 16A but is not rated for more than 6A if the load is continuous for more than 2 hours.