Floating ground ?

[dieseljeep]

Originally Posted by maxhifi

I've seen "back stabbed" receptacles fail due to electric space heaters, but I think pigtails on every receptacle is kind of a heavy handed solution to an issue which has more to do with bad terminations. I could see making a pigtail for the neutral, but for both hot and neutral is serious overkill.

I think you're referring to MWBC, multi-wire branch circuits, where a shared neutral is used. The code also changed on that, as well. MWBC's, now require a double pole breaker.
Regarding the pig-tailing of the neutral only, I've seen the hot conductor also burn up. A termination, that is subjected to a continuous heavy load is subject to heating and becoming loose. If all that's being used in a termination is a tiny bent piece of brass, holding the connection, any heating will cause it to lose it's tension.