Maximum current in copper and aluminum wire
Maximum current in aluminum and copper wire with ambient temperature 86oF (30oC):
Example - Maximum Current in 6 mm2 Aluminum Wire
6 mm2 aluminum wire is somewhere between AWG #9 and #10. To be on the safe side we use AWG #10 (the smallest one) in the figure above and estimates the maximum current to be approximately 30 amps.
Copper and Aluminum - Max. Current Diagram in Metric Units
Maximum current diagram based on wire size in metric units mm2: