Suggested wire gauge for current requirement:

Max Load Wire Size
Amps AWG
350 1/0
225 2
150 4
125 6
100 8
60 10
40 12
30 14
22 16
16 18
14 19
11 20
9 21
7 22
4.7 23
3.5 24
2.7 25
2.2 26
1.7 27
1.4 28
1.2 29
0.86 30
0.7 31
0.53 32