¡°I went to the experiment link but did not find info about length. Need to know if different wire guages are needed due to various different lengths:
Here are feeder lengths from some sidings to buss wires: 14", 16", 17", 18", 20", 21". ¡°
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Most systems manufacturers recommend 22 AWG for track feeders.
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I¡¯ve used wire stripped from old phone wire (24/26 AWG) for track feeders with great success up to two feet in length, but this was a hand laid track layout and every piece of rail had its own feeders,
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The tables Allan pointed out to you suggest that 24/26 AWG would be fine for runs up to two feet (all the lengths you mention above).