Greg,
That is one hell of a connector stack up what is its purpose?
>>> Actually an old picture, of my NCE DCC system...
Do you disconnect/isolate parts of the layout using the connectors?
>>>> yes, each "power district" is fully insulated from the others, really helps finding weak joiners faster, plus can quickly configure parts for DC or DCC
Connect test equipment to fault find blocks?
>>>> well yes, but normally the only issue is a weak joiner... with 20 amps surge on tap, small shorts are vaporized, as well as electrocution of the errant frog.
Is there some advantage over using terminal strip?
>>>> the ease of connecting and disconnecting is first, also I have a RampMeter for measuring DCC voltage and current and it has banana jacks also...
Just curious that's all.