"Drawing 'C' is a "busbar" arrangement - each board connects to the busbars, and the busbars in turn connect to the PSU."

While what you are trying to say is obvious, practical considerations might prevent lugging all the common lines a to a single post.

Thus if the bus bar is so heavy that voltage drop in it is so neglible ( as compared to the individual feed lines ) then this can pass for a "star" ? Right ? wrong? Atleast I have been thinking this is right till date !


Raghu