Yeah, I couldn't quote an NEC article either!
I'll have to check the Building Code book(s) and see what they say
(just for personal references and similar Injunear needs
...)
Man, I'll tell ya, the Earthquake which prompted me to post this question in the first place, sure got stuff gyrating all around!
Looked like a huge Inanimate Object Hula Dance festival!
The Seismic event (Quake) was the one that hit back in June/July of 2005 - with the Epicenter in Yucaipa (sp??).
Even though the energy reaching my location (Huntington Beach) was very minimal - mostly came in as "S" waves and lasted only 2 seconds max., it was enough to get all the suspended stuff moving like crazy!
Thanks everyone for the replies!
Scott35