What
size wire do I need?
Using the below charts, find the current in amps on
the left. Follow this to the left until you see the one way length of wire
you need in feet. Then look straight up to the wire size at the top. For
example, I want to run a 10 amp load wire 50' with 5% losses or less at 12
volt. I will need #6 AWG wire.
Wire Sizing Chart
Voltage |
12 |
|
Loss |
5% |
|
|
Wire Gauge |
14 |
12 |
10 |
8 |
6 |
4 |
2 |
1 |
1/0 |
2/0 |
3/0 |
4/0 |
|
Current |
(amps) |
1 |
106 |
169 |
269 |
427 |
679 |
1080 |
1717 |
2166 |
2730 |
3444 |
4342 |
5475 |
2 |
53 |
85 |
134 |
214 |
340 |
540 |
859 |
1083 |
1365 |
1722 |
2171 |
2738 |
3 |
35 |
56 |
90 |
142 |
226 |
360 |
572 |
722 |
910 |
1148 |
1447 |
1825 |
4 |
27 |
42 |
67 |
107 |
170 |
270 |
429 |
542 |
682 |
861 |
1086 |
1369 |
5 |
21 |
34 |
54 |
85 |
136 |
216 |
343 |
433 |
546 |
689 |
868 |
1095 |
6 |
18 |
28 |
45 |
71 |
113 |
180 |
286 |
361 |
455 |
574 |
724 |
913 |
7 |
15 |
24 |
38 |
61 |
97 |
154 |
245 |
309 |
390 |
492 |
620 |
782 |
8 |
13 |
21 |
34 |
53 |
85 |
135 |
215 |
271 |
341 |
430 |
543 |
684 |
9 |
12 |
19 |
30 |
47 |
75 |
120 |
191 |
241 |
303 |
383 |
482 |
608 |
10 |
11 |
17 |
27 |
43 |
68 |
108 |
172 |
217 |
273 |
344 |
434 |
548 |
15 |
7 |
11 |
18 |
28 |
45 |
72 |
114 |
144 |
182 |
230 |
289 |
365 |
20 |
NA |
8 |
13 |
21 |
34 |
54 |
86 |
108 |
136 |
172 |
217 |
274 |
25 |
NA |
NA |
11 |
17 |
27 |
43 |
69 |
87 |
109 |
138 |
174 |
219 |
30 |
NA |
NA |
9 |
14 |
23 |
36 |
57 |
72 |
91 |
115 |
145 |
183 |
35 |
NA |
NA |
NA |
12 |
19 |
31 |
49 |
62 |
78 |
98 |
124 |
156 |
40 |
NA |
NA |
NA |
NA |
17 |
27 |
43 |
54 |
68 |
86 |
109 |
137 |
45 |
NA |
NA |
NA |
NA |
15 |
24 |
38 |
48 |
61 |
77 |
96 |
122 |
50 |
NA |
NA |
NA |
NA |
14 |
22 |
34 |
43 |
55 |
69 |
87 |
110 |
55 |
NA |
NA |
NA |
NA |
12 |
20 |
31 |
39 |
50 |
63 |
79 |
100 |
60 |
NA |
NA |
NA |
NA |
11 |
18 |
29 |
36 |
45 |
57 |
72 |
91 |
Voltage |
12 |
|
Loss |
2% |
|
|
Wire Gauge |
14 |
12 |
10 |
8 |
6 |
4 |
2 |
1 |
1/0 |
2/0 |
3/0 |
4/0 |
|
Current |
(amps) |
1 |
43 |
68 |
107 |
171 |
272 |
432 |
687 |
866 |
1092 |
1377 |
1737 |
2190 |
2 |
21 |
34 |
54 |
85 |
136 |
216 |
343 |
433 |
546 |
689 |
868 |
1095 |
3 |
14 |
23 |
36 |
57 |
91 |
144 |
229 |
289 |
364 |
459 |
579 |
730 |
4 |
11 |
17 |
27 |
43 |
68 |
108 |
172 |
217 |
273 |
344 |
434 |
548 |
5 |
9 |
14 |
21 |
34 |
54 |
86 |
137 |
173 |
218 |
275 |
347 |
438 |
6 |
7 |
11 |
18 |
28 |
45 |
72 |
114 |
144 |
182 |
230 |
289 |
365 |
7 |
6 |
10 |
15 |
24 |
39 |
62 |
98 |
124 |
156 |
197 |
248 |
313 |
8 |
5 |
8 |
13 |
21 |
34 |
54 |
86 |
108 |
136 |
172 |
217 |
274 |
9 |
5 |
8 |
12 |
19 |
30 |
48 |
76 |
96 |
121 |
153 |
193 |
243 |
10 |
4 |
7 |
11 |
17 |
27 |
43 |
69 |
87 |
109 |
138 |
174 |
219 |
15 |
3 |
5 |
7 |
11 |
18 |
29 |
46 |
58 |
73 |
92 |
116 |
146 |
20 |
NA |
3 |
5 |
9 |
14 |
22 |
34 |
43 |
55 |
69 |
87 |
110 |
25 |
NA |
NA |
4 |
7 |
11 |
17 |
27 |
35 |
44 |
55 |
69 |
88 |
30 |
NA |
NA |
4 |
6 |
9 |
14 |
23 |
29 |
36 |
46 |
58 |
73 |
35 |
NA |
NA |
NA |
5 |
8 |
12 |
20 |
25 |
31 |
39 |
50 |
63 |
40 |
NA |
NA |
NA |
NA |
7 |
11 |
17 |
22 |
27 |
34 |
43 |
55 |
45 |
NA |
NA |
NA |
NA |
6 |
10 |
15 |
19 |
24 |
31 |
39 |
49 |
50 |
NA |
NA |
NA |
NA |
5 |
9 |
14 |
17 |
22 |
28 |
35 |
44 |
55 |
NA |
NA |
NA |
NA |
5 |
8 |
12 |
16 |
20 |
25 |
32 |
40 |
60 |
NA |
NA |
NA |
NA |
5 |
7 |
11 |
14 |
18 |
23 |
29 |
37 |
Voltage |
24 |
|
Loss |
5% |
|
|
Wire Gauge |
14 |
12 |
10 |
8 |
6 |
4 |
2 |
1 |
1/0 |
2/0 |
3/0 |
4/0 |
|
Current |
(amps) |
1 |
213 |
338 |
537 |
854 |
1359 |
2160 |
3434 |
4332 |
5460 |
6887 |
8684 |
10951 |
2 |
106 |
169 |
269 |
427 |
679 |
1080 |
1717 |
2166 |
2730 |
3444 |
4342 |
5475 |
3 |
71 |
113 |
179 |
285 |
453 |
720 |
1145 |
1444 |
1820 |
2296 |
2895 |
3650 |
4 |
53 |
85 |
134 |
214 |
340 |
540 |
859 |
1083 |
1365 |
1722 |
2171 |
2738 |
5 |
43 |
68 |
107 |
171 |
272 |
432 |
687 |
866 |
1092 |
1377 |
1737 |
2190 |
6 |
35 |
56 |
90 |
142 |
226 |
360 |
572 |
722 |
910 |
1148 |
1447 |
1825 |
7 |
30 |
48 |
77 |
122 |
194 |
309 |
491 |
619 |
780 |
984 |
1241 |
1564 |
8 |
27 |
42 |
67 |
107 |
170 |
270 |
429 |
542 |
682 |
861 |
1086 |
1369 |
9 |
24 |
38 |
60 |
95 |
151 |
240 |
382 |
481 |
607 |
765 |
965 |
1217 |
10 |
21 |
34 |
54 |
85 |
136 |
216 |
343 |
433 |
546 |
689 |
868 |
1095 |
15 |
14 |
23 |
36 |
57 |
91 |
144 |
229 |
289 |
364 |
459 |
579 |
730 |
20 |
NA |
17 |
27 |
43 |
68 |
108 |
172 |
217 |
273 |
344 |
434 |
548 |
25 |
NA |
NA |
21 |
34 |
54 |
86 |
137 |
173 |
218 |
275 |
347 |
438 |
30 |
NA |
NA |
18 |
28 |
45 |
72 |
114 |
144 |
182 |
230 |
289 |
365 |
35 |
NA |
NA |
NA |
24 |
39 |
62 |
98 |
124 |
156 |
197 |
248 |
313 |
40 |
NA |
NA |
NA |
NA |
34 |
54 |
86 |
108 |
136 |
172 |
217 |
274 |
45 |
NA |
NA |
NA |
NA |
30 |
48 |
76 |
96 |
121 |
153 |
193 |
243 |
50 |
NA |
NA |
NA |
NA |
27 |
43 |
69 |
87 |
109 |
138 |
174 |
219 |
55 |
NA |
NA |
NA |
NA |
25 |
39 |
62 |
79 |
99 |
125 |
158 |
199 |
60 |
NA |
NA |
NA |
NA |
23 |
36 |
57 |
72 |
91 |
115 |
145 |
183 |
Voltage |
24 |
|
Loss |
2% |
|
|
Wire Gauge |
14 |
12 |
10 |
8 |
6 |
4 |
2 |
1 |
1/0 |
2/0 |
3/0 |
4/0 |
|
Current |
(amps) |
1 |
85 |
135 |
215 |
342 |
543 |
864 |
1374 |
1733 |
2184 |
2755 |
3474 |
4380 |
2 |
43 |
68 |
107 |
171 |
272 |
432 |
687 |
866 |
1092 |
1377 |
1737 |
2190 |
3 |
28 |
45 |
72 |
114 |
181 |
288 |
458 |
578 |
728 |
918 |
1158 |
1460 |
4 |
21 |
34 |
54 |
85 |
136 |
216 |
343 |
433 |
546 |
689 |
868 |
1095 |
5 |
17 |
27 |
43 |
68 |
109 |
173 |
275 |
347 |
437 |
551 |
695 |
876 |
6 |
14 |
23 |
36 |
57 |
91 |
144 |
229 |
289 |
364 |
459 |
579 |
730 |
7 |
12 |
19 |
31 |
49 |
78 |
123 |
196 |
248 |
312 |
394 |
496 |
626 |
8 |
11 |
17 |
27 |
43 |
68 |
108 |
172 |
217 |
273 |
344 |
434 |
548 |
9 |
9 |
15 |
24 |
38 |
60 |
96 |
153 |
193 |
243 |
306 |
386 |
487 |
10 |
9 |
14 |
21 |
34 |
54 |
86 |
137 |
173 |
218 |
275 |
347 |
438 |
15 |
6 |
9 |
14 |
23 |
36 |
58 |
92 |
116 |
146 |
184 |
232 |
292 |
20 |
NA |
7 |
11 |
17 |
27 |
43 |
69 |
87 |
109 |
138 |
174 |
219 |
25 |
NA |
NA |
9 |
14 |
22 |
35 |
55 |
69 |
87 |
110 |
139 |
175 |
30 |
NA |
NA |
7 |
11 |
18 |
29 |
46 |
58 |
73 |
92 |
116 |
146 |
35 |
NA |
NA |
NA |
10 |
16 |
25 |
39 |
50 |
62 |
79 |
99 |
125 |
40 |
NA |
NA |
NA |
NA |
14 |
22 |
34 |
43 |
55 |
69 |
87 |
110 |
45 |
NA |
NA |
NA |
NA |
12 |
19 |
31 |
39 |
49 |
61 |
77 |
97 |
50 |
NA |
NA |
NA |
NA |
11 |
17 |
27 |
35 |
44 |
55 |
69 |
88 |
55 |
NA |
NA |
NA |
NA |
10 |
16 |
25 |
32 |
40 |
50 |
63 |
80 |
60 |
NA |
NA |
NA |
NA |
9 |
14 |
23 |
29 |
36 |
46 |
58 |
73 |
Voltage |
48 |
|
Loss |
5% |
|
|
Wire Gauge |
14 |
12 |
10 |
8 |
6 |
4 |
2 |
1 |
1/0 |
2/0 |
3/0 |
4/0 |
|
Current |
(amps) |
1 |
425 |
676 |
1074 |
1709 |
2717 |
4320 |
6869 |
8664 |
10919 |
13774 |
17369 |
21902 |
2 |
213 |
338 |
537 |
854 |
1359 |
2160 |
3434 |
4332 |
5460 |
6887 |
8684 |
10951 |
3 |
142 |
225 |
358 |
570 |
906 |
1440 |
2290 |
2888 |
3640 |
4591 |
5790 |
7301 |
4 |
106 |
169 |
269 |
427 |
679 |
1080 |
1717 |
2166 |
2730 |
3444 |
4342 |
5475 |
5 |
85 |
135 |
215 |
342 |
543 |
864 |
1374 |
1733 |
2184 |
2755 |
3474 |
4380 |
6 |
71 |
113 |
179 |
285 |
453 |
720 |
1145 |
1444 |
1820 |
2296 |
2895 |
3650 |
7 |
61 |
97 |
153 |
244 |
388 |
617 |
981 |
1238 |
1560 |
1968 |
2481 |
3129 |
8 |
53 |
85 |
134 |
214 |
340 |
540 |
859 |
1083 |
1365 |
1722 |
2171 |
2738 |
9 |
47 |
75 |
119 |
190 |
302 |
480 |
763 |
963 |
1213 |
1530 |
1930 |
2434 |
10 |
43 |
68 |
107 |
171 |
272 |
432 |
687 |
866 |
1092 |
1377 |
1737 |
2190 |
15 |
28 |
45 |
72 |
114 |
181 |
288 |
458 |
578 |
728 |
918 |
1158 |
1460 |
20 |
NA |
34 |
54 |
85 |
136 |
216 |
343 |
433 |
546 |
689 |
868 |
1095 |
25 |
NA |
NA |
43 |
68 |
109 |
173 |
275 |
347 |
437 |
551 |
695 |
876 |
30 |
NA |
NA |
36 |
57 |
91 |
144 |
229 |
289 |
364 |
459 |
579 |
730 |
35 |
NA |
NA |
NA |
49 |
78 |
123 |
196 |
248 |
312 |
394 |
496 |
626 |
40 |
NA |
NA |
NA |
NA |
68 |
108 |
172 |
217 |
273 |
344 |
434 |
548 |
45 |
NA |
NA |
NA |
NA |
60 |
96 |
153 |
193 |
243 |
306 |
386 |
487 |
50 |
NA |
NA |
NA |
NA |
54 |
86 |
137 |
173 |
218 |
275 |
347 |
438 |
55 |
NA |
NA |
NA |
NA |
49 |
79 |
125 |
158 |
199 |
250 |
316 |
398 |
60 |
NA |
NA |
NA |
NA |
45 |
72 |
114 |
144 |
182 |
230 |
289 |
365 |
Voltage |
48 |
|
Loss |
2% |
|
|
Wire Gauge |
14 |
12 |
10 |
8 |
6 |
4 |
2 |
1 |
1/0 |
2/0 |
3/0 |
4/0 |
|
Current |
(amps) |
1 |
170 |
270 |
430 |
683 |
1087 |
1728 |
2748 |
3466 |
4368 |
5510 |
6947 |
8761 |
2 |
85 |
135 |
215 |
342 |
543 |
864 |
1374 |
1733 |
2184 |
2755 |
3474 |
4380 |
3 |
57 |
90 |
143 |
228 |
362 |
576 |
916 |
1155 |
1456 |
1837 |
2316 |
2920 |
4 |
43 |
68 |
107 |
171 |
272 |
432 |
687 |
866 |
1092 |
1377 |
1737 |
2190 |
5 |
34 |
54 |
86 |
137 |
217 |
346 |
550 |
693 |
874 |
1102 |
1389 |
1752 |
6 |
28 |
45 |
72 |
114 |
181 |
288 |
458 |
578 |
728 |
918 |
1158 |
1460 |
7 |
24 |
39 |
61 |
98 |
155 |
247 |
393 |
495 |
624 |
787 |
992 |
1252 |
8 |
21 |
34 |
54 |
85 |
136 |
216 |
343 |
433 |
546 |
689 |
868 |
1095 |
9 |
19 |
30 |
48 |
76 |
121 |
192 |
305 |
385 |
485 |
612 |
772 |
973 |
10 |
17 |
27 |
43 |
68 |
109 |
173 |
275 |
347 |
437 |
551 |
695 |
876 |
15 |
11 |
18 |
29 |
46 |
72 |
115 |
183 |
231 |
291 |
367 |
463 |
584 |
20 |
NA |
14 |
21 |
34 |
54 |
86 |
137 |
173 |
218 |
275 |
347 |
438 |
25 |
NA |
NA |
17 |
27 |
43 |
69 |
110 |
139 |
175 |
220 |
278 |
350 |
30 |
NA |
NA |
14 |
23 |
36 |
58 |
92 |
116 |
146 |
184 |
232 |
292 |
35 |
NA |
NA |
NA |
20 |
31 |
49 |
79 |
99 |
125 |
157 |
198 |
250 |
40 |
NA |
NA |
NA |
NA |
27 |
43 |
69 |
87 |
109 |
138 |
174 |
219 |
45 |
NA |
NA |
NA |
NA |
24 |
38 |
61 |
77 |
97 |
122 |
154 |
195 |
50 |
NA |
NA |
NA |
NA |
22 |
35 |
55 |
69 |
87 |
110 |
139 |
175 |
55 |
NA |
NA |
NA |
NA |
20 |
31 |
50 |
63 |
79 |
100 |
126 |
159 |
60 |
NA |
NA |
NA |
NA |
18 |
29 |
46 |
58 |
73 |
92 |
116 |
146 |
|