A 10 mm squared conductor is equal to a #8 AWG.
A #8 copper conductor with an insulation factor of 75 or 90 degrees C are both rated at 45 amps.
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10 amps
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.
For 3-core twin and earth cables up to 4 sq mm with reasonable air circulation, allow 8 amps per sq mm for copper and 5 amps per sq mm for aluminium. For permanent installations with high usage per day, use 4 amps per sq mm.
300a
4amps can pass in 1sqmm of wire max it is universal. In the UK 1 sq. mm wire can take 10 amps max according to tables. Cables that become warm in use should be replaced by a thicker gauge.