That depends on what temperature-rise you'll accept, and on what type of coating
or jacketing surrounds the cable, and on the airflow around the cable.
A #10 copper wire in a NMD90 cable is rated at 30 amps.
10 amps
5 amps
55 amps on copper wire.
6mm2 cable is rated at 40amps
It will taken 8 amps <<>> The conversion of 2.5 sq mm wire to AWG is equal to a #12 wire. The ampacity of a #12 copper wire with an insulation factor of 90 degrees C is 20 amps.
44.8AMPS
1 mm2 aluminium wire is not easy to buy but 1 mm2 copper wire is rated at 10 amps. Since the conductivity of aluminium is 7/12 that of copper, 1 mm2 aluminium wire would be rated at 7½ amps max (the same amount of heat is produced per metre by a current of sqrt(7/12) times that for copper).
200 amps on a single phase service. Incoming cable should be 4/0 Aluminum or 3/0 copper. Aluminum is OK for entrance cable, as it is stranded and is made of an alloy that does not have "creep" like the single strand aluminum wire of the 70s had.
#14 copper wire is rated at 15 amps, # 12 copper is rated at 20. The maximum capacity of any wire is 80% so remember to derate your current by multiplying the rated current by .8
That depends on how much current (Amps) is flowing through the copper. The voltage you lose in the copper will always be (A) times (R). 'A' is the current (amps) in the copper. 'R' is the resistance of the copper. You can look that up in a product catalog, or measure it with a really good ohm-meter.
A 2/0 copper conductor with an insulation rating of75 and 90 degrees Care rated at 175 and 185 amps respectively.