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Wire
Determining the right gauge of wire for any circuit is simple using the chart below.
Find the amperes or watts the circuit is expected to carry on the left and the distance the wiring must run at the top.
Follow the columns until they intersect.
For example, a 12 volt circuit which is 15 feet long and carries 10 amperes should use at least 16 gauge wire.
|
WIRE GAUGE SELECTION TABLE |
||||||||||
|
Amperes |
Watts |
Wire gauge (for length in feet) |
||||||||
|
6V |
12V |
6V |
12V |
3′ |
5′ |
7′ |
10′ |
15′ |
20′ |
25′ |
|
0 to 2.5 |
0 to 5 |
15 |
30 |
18 |
18 |
18 |
18 |
18 |
18 |
18 |
|
3.0 |
6 |
18 |
36 |
18 |
18 |
18 |
18 |
18 |
18 |
16 |
|
3.5 |
7 |
21 |
42 |
18 |
18 |
18 |
18 |
18 |
18 |
16 |
|
4.0 |
8 |
24 |
48 |
18 |
18 |
18 |
18 |
18 |
16 |
16 |
|
5.0 |
10 |
30 |
60 |
18 |
18 |
18 |
18 |
16 |
16 |
16 |
|
5.5 |
11 |
33 |
66 |
18 |
18 |
18 |
18 |
16 |
16 |
14 |
|
6.0 |
12 |
36 |
72 |
18 |
18 |
18 |
18 |
16 |
16 |
14 |
|
7.5 |
15 |
45 |
90 |
18 |
18 |
18 |
18 |
14 |
14 |
12 |
|
9.0 |
18 |
54 |
108 |
18 |
18 |
16 |
16 |
14 |
14 |
12 |
|
10 |
20 |
60 |
120 |
18 |
18 |
16 |
16 |
14 |
12 |
10 |
|
11 |
22 |
66 |
132 |
18 |
18 |
16 |
16 |
12 |
12 |
10 |
|
12 |
24 |
72 |
144 |
18 |
18 |
16 |
16 |
12 |
12 |
10 |
|
15 |
30 |
90 |
180 |
18 |
16 |
16 |
14 |
10 |
10 |
10 |
|
20 |
40 |
120 |
240 |
18 |
16 |
14 |
12 |
10 |
10 |
8 |
|
25 |
50 |
150 |
300 |
16 |
14 |
12 |
12 |
10 |
10 |
8 |
|
50 |
100 |
300 |
600 |
12 |
12 |
10 |
10 |
6 |
6 |
4 |
|
75 |
150 |
450 |
900 |
10 |
10 |
8 |
8 |
4 |
4 |
2 |
|
100 |
200 |
600 |
1200 |
10 |
8 |
8 |
6 |
4 |
4 |
2 |
American Wire Gauge (AWG) sizes may be determined by measuring the diameter of the conductor (the bare wire) with the insulation removed.
Refer to the Wire gauge Diameter Table for dimensions.
|
Wire Gauge Equivalency |
||
|
AWG |
Wire Dia. in inches |
Metric mm2 |
|
20 |
0.03196118 |
0.5 |
|
18 |
0.040303 |
0.8 |
|
16 |
0.0508214 |
1.0 |
|
14 |
0.064084 |
2.0 |
|
12 |
0.08080810 |
3.0 |
|
10 |
0.10189 |
5.0 |
|
8 |
0.128496 |
8.0 |
|
6 |
0.16202 |
13.0 |
|
5 |
0.18194 |
19.0 |
|
4 |
0.20431 |
32.0 |
|
3 |
0.22942 |
52.0 |
|
2 |
0.25763 |
|
|
1 |
0.2893 |
|
|
0 |
0.32486 |
|
|
00 |
0.3648 |
|
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