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Re: Why the smaller wire gauge?
Weight. Wire weight can add up. FIRST is known for using wire gauges that are very low even though that size wire would never really be necessary. It is mostly for safety, and to eliminate the possibility of using too small of wire, but our team electrical mentor always complains/wonders why in the world FIRST chose the gauges they did.
In the end, the smaller gauge is just going to help in weight, and clean up the board a little bit if you have a large number of wires running.
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