Originally Posted by
Chris Padilla
Steve,
Electricity in general is dangerous if things are done incorrectly. Perhaps MWBC are "more" prone to being wired improperly or handled improperly? I did the search and found a link describing how IF THE NEUTRAL was disconnected and how long would a TV with 240 V across it burn up? I guess I can see that. Perhaps someone is working on a receptacle on a MWB and removes it temporarily or something. If that receptacle wasn't wired pigtailed, I guess that neutral could be disconnected. I can see in 3-phase that if the wrong neutral is picked to add a circuit too and if the circuit isn't fully shut down that an over-voltage condition can exist.
But again, if things are done wrong, then sure, things could go awry quickly. An open/disconnected neutral is an extremely dangerous condition and I can see how it would be more so in a MWBC. I can see how things in MWBC can go awry more easily than in other situations.