Thanks to each of you for your help.
As the layout host (during ops sessions), having a centralized, easily visible control panel will help direct me to where the "problem" is. (Each breaker has a light that flashes when tripped.) An added benefit (as Don points out) is the decrease in voltage drop. For the three track buss runs to the right, using 14 AWG will keep the voltage drop acceptable. If I use a single run that splits the first stretch of the run will need to be at least 12 AWG.
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As always, be in good health and do good work.
-Michael
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????????? The miracle is this: The more we share the more we have.
????????????????????? Leonard Nimoy
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Michael Boyle