All this may become clearer in 2008. The has been an acceptance in principle that will change the wording. Anyone who has downloaded the ROP can look at 6-61 Log #194 NEC-P06.
I think the statement of the panel sums it up.
" The panel agrees that the present wording is ambiguous. It is the panel’s intent that this allowance apply only to conductors carrying 100% of the dwelling unit’s diversified load."
BTW, thanks for all the replies.
[This message has been edited by Tom (edited 02-06-2007).]
