Edward-
I'm studying at home. In rainy California.
The answer to this question answered part of another issue I've been scratching my head about.
On line-line loads such as 240 mentioned, I understand here is a potential difference of 240v between both ungrounded conductors, and 120v potential between each ungrounded and grounded. So where is the return path for the current. None of my books go that deep into it. I'm guessing it's going throught the groundING conductor.
Example- You lose the neutral on a multiwire circuit. You end up with 240v. Where is the return path?