Alternator Wire Gauge Chart

Alternator

Any time you upgrade your alternator you should strongly consider upgrading the gauge (size) of the wire that charges that battery as well as the fusible link in case of a short.


Alternator Output (Amps)
Wire Length
4 ft or less
4-7 ft
7-10 ft
10-13 ft
13-16 ft
20 or less
14
12
12
10
10
20-35
12
10
8
8
6
35-50
10
8
8
6
6
50-65
8
8
6
4
4
65-85
6
6
4
4
2
85-105
6
6
4
2
2
105-125
4
4
4
2
2
125-150
2
2
2
2
0

 

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