In article , bud-- wrote:
Doug Miller wrote:
In article , "Twayne"
wrote:

I don't think that makes sense so, assuming I'm right, how is it that an
overload on one isn't affected (delayed, held from tripping) by the force
the other needs to be opened?

It trips with ample force to bring the other one along with it, even if the
only connection is an external tie.

Move a breaker handle from the 'off' position to the 'on' position; notice
how
much force you have to apply to it. Now nudge it from 'on' to 'tripped' --
see
how easy that was, and how forcefully it snaps over? More than enough to
trip a second handle tied to it.


Nice answers to some bizarre misinformation. I would disagree only that
if you have multiple breakers with a handle tie, one breaker tripping
will not necessarily trip the other breaker.

Perhaps you'd like to explain how it's possible for one handle of a pair tied
together to move from the on to the tripped position, while the other member
of that tied pair remains in the on position...? :-)

The NEC requirement (if I
remember right) is for a common disconnect, not a common trip.

There's no practical difference.

The common disconnect requirement was added in the 2008 NEC (or possibly
2005).

2008 -- and way past time, too, IMHO.