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9
wire
&
cable
Scan for
pricing
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wire gauge chart
12 volt system
total length of wire in circuit from power supply to accessory
amp
(approx.)
candle
power
2.5'
gauge
5'
gauge
10'
gauge
20'
gauge
30'
gauge
40'
gauge
50'
gauge
60'
gauge
80'
gauge
100'
gauge
1
6
20
20
20
20
20
20
20
20
20
18
1.5
10
20
20
20
20
20
20
20
20
18
18
2
16
20
20
20
20
20
20
18
18
16
16
3
24
20
20
20
20
20
18
18
16
16
14
4
30
20
20
20
20
18
16
16
16
14
12
5
40
20
20
20
18
18
16
14
14
12
12
6
50
20
20
20
18
16
16
14
14
12
12
7
60
20
20
20
18
16
14
14
12
12
10
8
70
20
20
20
16
16
14
12
12
10
10
10
80
20
20
18
16
14
12
12
12
10
10
11
90
20
20
18
16
14
12
12
10
10
8
12
100
20
20
18
16
14
12
12
10
10
8
15
120
20
20
18
14
12
12
10
10
8
8
18
140
20
20
16
14
12
10
10
8
8
8
20
160
20
18
16
12
12
10
10
8
8
6
22
180
20
18
16
12
10
10
8
8
8
6
24
200
20
18
16
12
10
10
8
8
6
6
36
-
20
16
14
10
8
8
8
6
6
4
50
-
18
16
12
1
8
6
6
4
4
2
100
-
14
12
10
6
4
4
2
2
1
0
150
-
14
10
8
4
2
2
1
0
00
00
200
-
12
8
6
4
2
1
0
00
000 0000
Note: This chart is based on a 10% maximum voltage drop. For 5% voltage drop, use double the measured wire length.
When mechanical strength is a factor, use next larger wire gauge.