That reminds me of a discussion at a German board... NYM cable (equivalent to NM) is round, and when adopting the new color codes they changed the order of the wires from black-brown-blue-ye/gn to something else, I think brown-black-blue-ye/gn looking at the end of the cable. And some guys were seriously discussing whether it would be ILLEGAL to use old cable with the different order!
Adn another guy proceeded to ask: "Why??? Does that confuse the electrons? Do they get dizzy if black and brwon are reversed???" [Linked Image]