What is the correct size power wire to use?

There is much debate over the benefit of certain wiring schemes (oxygen-free, multistranded, braided, twisted, air core, you name it). However, most people do agree that the most important factor in selecting power wire is to use the proper size. Wire is generally rated in size by American Wire Gauge, abbreviated AWG, or commonly just gauge (ga). To determine the correct wire size for your application, you should first determine the maximum current flow through the cable, this can be done by finding the amperage load of the component being powered, then determine the length of the cable that your will use, and consult the following chart.

Length of run (in feet)

Current

0-4

4-7

7-10

10-13

13-16

16-19

19-22

22-28

0-20A

14ga

12ga

12ga

10ga

10ga

8ga

8ga

8ga

20-35A

12ga

10ga

8ga

8ga

6ga

6ga

6ga

4ga

35-50A

10ga

8ga

8ga

6ga

6ga

4ga

4ga

4ga

50-65A

8ga

8ga

6ga

4ga

4ga

4ga

4ga

2ga

65-85A

6ga

6ga

4ga

4ga

2ga

2ga

2ga

0ga

85-105A

6ga

6ga

4ga

2ga

2ga

2ga

2ga

0ga

105-125A

4ga

4ga

4ga

2ga

2ga

0ga

0ga

0ga

125-150A

2ga

2ga

2ga

2ga

0ga

0ga

0ga

00ga