It's in the title, but is 26 AWG wire enough to handle power to the Pi via the 5v/GND pins?
The docs mention not to use poorly crimped wire, but don't specify an ideal gauge range. I've read elsewhere that 22 AWG would be fine, but I happen to have a bunch of well-crimped 26 AWG jumpers handy, and would like to use them in a semi-permanent implementation, if they'll do. I'd prefer a more educated opinion than my own on the matter before I potentially sabotage my project with under-gauged wires.
Thanks!
Search for Ampacity of wire, you'll find a ton of tables (mostly related to residential house wiring), and there will be some that describe smaller gauge wire. Since the Pi power supply it 2.5A, all you need to do is:
1. Make sure the gauge wire you're using has sufficient ampacity to support the power source,
2. that the voltage drop along the length of wire (x2 because you have drop in both directions) doesn't exceed the minimum supply limits of the Pi.
In other cases you might also have to worry about inductance, but in this case the Pi power supply will filter this issue away.
Tom