I believe, but am not 100% sure, that the ground or common wire means that any ground wire for anything can be attached to a ground or common bus wire. Is that true?
If so, can I attach to the common bus wire all ground wires for the inner and outer main loops that are independently powered and interconnected?
Can I also attach to the common bus wire all ground wires for all of my 9 independently powered sidings?
In addition, can I attach to the same common bus wire all ground wires for my numerous postwar accessories? Arnold