Unless designed otherwise, the truss frame construction supporting the floor of an attic are not designed to carry much of a load. I do not have my book here, but I will try to read it at work and let you know.
When running wire in an unfinished attic, lets not forget about 320.23, especially since drilling is not an option! Pierre
[This message has been edited by PCBelarge (edited 10-25-2003).]