Lets say you have a 2 level layout where one track is over the other track at some point (or two). There is a simple lighted accessory in the back portion of the layout, and the wires of that accessory pass under the upper level track. Would this create a ground plane? My understanding is that as long as a simple wire passes under a track and that wire is then connected to an earth ground, like 3rd prong, this would causes a ground plane. Would the simple accessory mentioned, if wired to a transformer in a normal mode act as a ground plane? (the normal transformer ground). thanks, sorry if it sounds confusing.
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