Wire Sizing Charts

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1. On the left, locate the current you will be dealing with.
2. Move across to locate the distance the amperage will travel
3. Move up to locate size of cable to be used.

- indicates that the current exceeds the ampacity rating of that size wire.


12V Wire Sizing

Maximum one-way distance for 5% voltage loss in 12V systems

 

  Wire Size (AWG)
Current
Amps
14 12 10 8 6 4 2 1 0 00 000 0000
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 - 8 13 21 34 54 86 108 136 172 217 274
25 - - 11 17 27 43 69 87 109 138 174 219
30 - - 9 14 23 36 57 72 91 115 145 183
35 - - - 12 19 31 49 62 78 98 124 156
40 - - - - 17 27 43 54 68 86 109 137
45 - - - - 15 24 38 48 61 77 96 122
50 - - - - 14 22 34 43 55 69 87 110
100 - - - - 3 5 7 9 12 15 19 23
150 - - - - - - 5 6 8 10 12 15
200 - - - - - - 4 2 6 7 9 11

 

24V Wire Sizing

Maximum one-way distance for 5% voltage loss in 24V systems

 

  Wire Size (AWG)
Current
Amps
14 12 10 8 6 4 2 1 0 00 000 0000
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 - 17 27 43 68 108 172 217 273 344 434 548
25 - - 21 34 54 86 137 173 218 275 347 438
30 - - 18 28 45 72 114 144 182 230 289 365
35 - - - 24 39 62 98 124 156 197 248 313
40 - - - - 34 54 86 108 136 172 217 274
45 - - - - 30 48 76 96 121 153 193 243
50 - - - - 27 43 69 87 109 138 175 219