SageBrush said:
^^ My electrician put red tape on the white wire he used for the second 'hot' connection.
Ah, so it's true! And tape, no less, which always seems to lose its stickiness after a few years. Excuse me while I adjust to the new (to me) reality... wow. What a weird world.
A yellow stripe is a good idea. I don't think I have noticed it on my wires.
It's one of those international standards. In my country, "international" has favourable connotations: standardization, the good of the world, working together towards a common goal, that sort of thing. I get the feeling that in the USA, not so much. My apologies if that's unkind or simply mistaken.