Well... we are guilty of misunderstanding from time to time it's just that those people we misunderstand don't have skin as thick as ours.....
The only apology I offer up is that it was important to me to explain the why. This OP has the knowledge IMO to have understood where his thinking was incorrect....so I went out on that proverbial limb to appeal to his desire to learn. Sometimes that requires you to swallow hard and admit you have made a mistake in your thinking...the good part in all this is the OP did in the end chose a good recourse...I simply wanted him to understand the why of it.
Now having said that he does have an incorrect cable for a dryer supply branch circuit if it is red,black and green. I'm not going to scream about using the green as the neutral if he goes to 3 wires. It is however a risk for someone else down the road to mistake the green for a non-current carrying wire.He should at least identify it as such. As we all now it's these kind of mistakes by others that get seasoned electricians shocked or worse.
" One nice thing about the NEC articles ... you have lots of choices"