Cat 5 Ampacity

http://www.sumidacrossing.org/LayoutElectricity/MRRWire/WireAmpacity/

From Stefan H.:

Under the following assumptions up to 3A should be fine.

- 26AWG cat5/6 cable

- using two leads

- cable is relatively short

- normal ambient temps

- stepper control (at most use 75% of configured drive current)

Also: https://en.wikipedia.org/wiki/American_wire_gauge