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Wire Sizing Charts
Here is a few charts to help you with what size of wire you need.
This information is provided as a reference only.
|
Wire Sizing Chart 12 Volt System
Maximum one-way distance ( feet ) for 2% voltage loss
in 12 volt systems. Wire Size (AWG) Do not exceed the 2% drop for wire between PV modules and batteries.
|
|
Amps
|
14
|
12
|
10
|
8
|
6
|
4
|
2
|
1/0
|
2/0
|
4/0
|
|
1
|
45
|
70
|
115
|
180
|
290
|
456
|
720
|
.
|
.
|
.
|
|
2
|
22.5
|
35
|
57.5
|
90
|
145
|
228
|
360
|
580
|
720
|
1060
|
|
4
|
10
|
17.5
|
27.5
|
45
|
72.5
|
114
|
180
|
290
|
360
|
580
|
|
6
|
7.5
|
12
|
17.5
|
30
|
47.5
|
75
|
120
|
193
|
243
|
380
|
|
8
|
5.5
|
8.5
|
11.5
|
22.5
|
35.5
|
57
|
90
|
145
|
180
|
290
|
|
10
|
4.5
|
7
|
11.5
|
18
|
28.5
|
45.5
|
72.5
|
115
|
145
|
230
|
|
15
|
3
|
4.5
|
7
|
12
|
19
|
30
|
48
|
76.5
|
96
|
150
|
|
20
|
2
|
3.5
|
5.5
|
9
|
14.5
|
22.5
|
36
|
57.5
|
72.5
|
116
|
|
25
|
1.8
|
2.8
|
4.5
|
7
|
11.5
|
18
|
29
|
46
|
58
|
92
|
|
30
|
1.5
|
2.4
|
3.5
|
6
|
9.5
|
15
|
24
|
38.5
|
48.5
|
77
|
|
40
|
-
|
-
|
2.8
|
4.5
|
7
|
11.5
|
18
|
29
|
36
|
56
|
|
50
|
-
|
-
|
2.3
|
3.6
|
5.5
|
9
|
14.5
|
23
|
29
|
46
|
|
100
|
-
|
-
|
-
|
-
|
2.9
|
4.6
|
7.2
|
11.5
|
14.5
|
23
|
|
150
|
-
|
-
|
-
|
-
|
-
|
-
|
4.8
|
7.7
|
9.7
|
15
|
|
200
|
-
|
-
|
-
|
-
|
-
|
-
|
3.6
|
5.8
|
7.3
|
11
|
|
Wire Sizing Chart 12 Volt System
Maximum one-way distance ( feet ) for 5% voltage loss
in 12 volt systems. Wire Size (AWG) A 5% loss is acceptable between batteries and lighting circuits in most cases. |
|
Amps
|
14
|
12
|
10
|
7
|
6
|
4
|
2
|
1
|
1/0
|
2/0
|
4/0
|
|---|---|---|---|---|---|---|---|---|---|---|---|
|
1
|
106
|
169
|
269
|
427
|
679
|
1080
|
1717
|
2166
|
2730
|
3444
|
5475
|
|
2
|
53
|
85
|
134
|
214
|
340
|
540
|
859
|
1083
|
1365
|
1722
|
2738
|
|
4
|
27
|
42
|
67
|
107
|
170
|
270
|
429
|
542
|
682
|
861
|
1369
|
|
6
|
18
|
28
|
45
|
71
|
113
|
180
|
286
|
361
|
455
|
574
|
913
|
|
8
|
13
|
21
|
34
|
53
|
85
|
135
|
215
|
271
|
341
|
430
|
684
|
|
10
|
11
|
17
|
27
|
43
|
68
|
108
|
172
|
217
|
273
|
344
|
548
|
|
15
|
7
|
11
|
18
|
28
|
45
|
72
|
114
|
144
|
182
|
230
|
365
|
|
20
|
-
|
8
|
13
|
21
|
34
|
54
|
86
|
108
|
136
|
172
|
274
|
|
25
|
-
|
-
|
11
|
17
|
27
|
43
|
69
|
87
|
109
|
138
|
219
|
|
30
|
-
|
-
|
9
|
14
|
23
|
36
|
57
|
72
|
91
|
115
|
183
|
|
35
|
-
|
-
|
-
|
12
|
19
|
31
|
49
|
62
|
78
|
98
|
156
|
|
40
|
-
|
-
|
-
|
-
|
17
|
27
|
43
|
54
|
68
|
86
|
137
|
|
45
|
-
|
-
|
-
|
-
|
15
|
24
|
38
|
48
|
61
|
77
|
122
|
|
50
|
-
|
-
|
-
|
-
|
14
|
22
|
34
|
43
|
55
|
69
|
110
|
|
Wire Sizing Chart 24 Volt System
Maximum one-way distance ( feet ) for 5% voltage loss
in 24 volt systems. Wire Size (AWG) A 5% loss is acceptable between batteries and lighting circuits in most cases.
|
|
Amps
|
14
|
12
|
10
|
7
|
6
|
4
|
2
|
1
|
1/0
|
2/0
|
4/0
|
|---|---|---|---|---|---|---|---|---|---|---|---|
|
1
|
213
|
338
|
537
|
854
|
1359
|
2160
|
3434
|
4332
|
5460
|
6887
|
10951
|
|
2
|
106
|
169
|
269
|
427
|
679
|
1080
|
1717
|
2166
|
2730
|
3444
|
5475
|
|
4
|
53
|
85
|
134
|
214
|
340
|
540
|
859
|
1083
|
1365
|
1722
|
2738
|
|
6
|
35
|
56
|
90
|
142
|
226
|
360
|
572
|
722
|
910
|
1148
|
1825
|
|
8
|
27
|
42
|
67
|
107
|
170
|
270
|
429
|
542
|
682
|
861
|
1369
|
|
10
|
21
|
34
|
54
|
85
|
136
|
216
|
343
|
433
|
546
|
689
|
1095
|
|
15
|
14
|
23
|
36
|
57
|
91
|
144
|
229
|
289
|
364
|
459
|
730
|
|
20
|
-
|
17
|
27
|
43
|
68
|
108
|
172
|
217
|
273
|
344
|
548
|
|
25
|
-
|
-
|
21
|
34
|
54
|
86
|
137
|
173
|
218
|
275
|
438
|
|
30
|
-
|
-
|
18
|
28
|
45
|
72
|
114
|
144
|
182
|
230
|
365
|
|
35
|
-
|
-
|
-
|
24
|
39
|
62
|
98
|
124
|
156
|
197
|
313
|
|
40
|
-
|
-
|
-
|
-
|
34
|
54
|
86
|
108
|
136
|
172
|
274
|
|
45
|
-
|
-
|
-
|
-
|
30
|
48
|
76
|
96
|
121
|
153
|
243
|
|
50
|
-
|
-
|
-
|
-
|
27
|
43
|
69
|
87
|
109
|
138
|
219
|
|
|
|
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NEC allows rounding up cable ampacity to next standard fuse or breaker.
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