I don't see any reason why you can't treat a class 2 circuit as a class 1 if you wire it all to class 1 standards. All the voltage/current limits I see in the definitions are upper limits, not lower ones.
If anything in that circuit is not appropriate for a class 1 you can't do it.
[This message has been edited by gfretwell (edited 08-09-2006).]
