22 and 24 are way too small for track power. You should be using at least 18 and 16 would be better. Your bus wires could go up to 14. I use 12, but I have long distance runs. Your wire size should be matched to your circuit protection in Amps. I know the values for 12 and 14 are 20 Amps and 15 Amps respectively, because those are used in house wiring. There is a table that has all the Ampacity values for the various gauges. You can never go wrong by over sizing. You can cause a fire by under sizing.
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