the current carrying capacity of 16sq.mm copper conductor is as below:
For Single phase A.C or D.C is - 76 amperes (VIR insulated) and that
For Three phase A.C or D.C is - 66 amperes. (rubber insulated)
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30 amps
in air it will be 665Amps.
475 amps, per NEC 310-16. Note that this is a maximum; there are many reasons to derate the current carrying capacity of the wire.
25 amps, 6000 watts
1 sq..mm have max. capacity is 10 ampere if these are of copper approximately than 120 sq..mm having current carrying capacity is 1200 ampere