Solar Wiring Guide

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Wire Sizing Chart: 12 Volt System
Wire
Gauge
Amps 14 12 10 8 6 4 2 1
1 106 169 169 427 679 1080 1717 2166
2 53 85 134 214 340 540 859 1083
4 27 42 67 107 170 270 429 542
6 18 18 45 71 113 180 286 361
8 13 21 34 53 85 135 216 271
10 11 17 27 43 68 108 172 217
15 7 11 18 28 45 72 114 144
20 – 8 13 21 34 54 86 108
25 – – 11 17 27 43 69 87
30 – – 9 14 23 36 57 72
Wire Sizing Chart: 24 Volt System
Wire
Gauge
Amps 14 12 10 8 6 4 2 1
1 213 338 537 854 1359 2160 3434 4332
2 108 169 269 427 679 1080 1717 2166
4 53 85 134 214 340 540 859 1083
6 35 56 90 142 226 360 572 722
8 27 42 67 107 170 270 429 542
10 21 34 54 85 136 216 343 433
15 14 23 36 57 91 144 229 289
20 – 17 27 43 68 108 172 217
25 – – 21 34 54 86 137 173
30 – – 18 28 45 72 114 144

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