Wire Gauge Selection Table

Circuit Amps
6 Volt 12 Volt
Wire Gauge (for total length of wire)
3' 5' 7' 10' 15' 20' 25' 30'
18 18 18 18 18 18 18 18
18 18 18 18 18 18 16 16
18 18 18 18 18 18 16 16
18 18 18 18 18 16 16 16
18 18 18 18 16 16 16 14
18 18 18 18 16 16 14 14
18 18 18 18 16 16 14 14
18 18 18 18 14 14 12 12
18 18 16 16 14 14 12 12
18 18 16 16 14 12 10 10
18 18 16 16 12 12 10 10
18 18 16 16 12 12 10 10
18 16 16 14 10 10 10 10
18 16 14 12 10 10 8 8
16 14 12 12 10 10 8 8
12 12 10 10 6 6 4 4
10 10 8 8 4 4 2 2
10 8 8 6 4 4 2 2
0-2.5 0-5
3 6
3.5 7
4 8
5 10
5.5 11
6 12
7.5 15
9 18
10 20
11 22
12 24
15 30
20 40
25 50
50 100
75 150
100 200