| Distance - Feet | |||||||
| 10 | 15 | 20 | 25 | 30 | 40 | 50 | |
| Amps | Wire Gauge | ||||||
| 5 | 18 | 16 | 14 | 12 | 12 | 10 | 10 |
| 10 | 14 | 12 | 10 | 10 | 10 | 8 | 6 |
| 15 | 12 | 10 | 10 | 8 | 8 | 6 | 6 |
| 20 | 10 | 10 | 8 | 6 | 6 | 6 | 4 |
| 25 | 10 | 8 | 6 | 6 | 6 | 4 | 4 |
| 30 | 10 | 8 | 6 | 6 | 4 | 4 | 2 |
| 40 | 8 | 6 | 6 | 4 | 4 | 2 | 2 |
| 50 | 6 | 6 | 4 | 4 | 2 | 2 | 1 |
| 60 | 6 | 4 | 4 | 2 | 2 | 1 | 0 |
| 70 | 6 | 4 | 2 | 2 | 1 | 0 | 2/0 |
| 80 | 6 | 4 | 2 | 2 | 1 | 0 | 3/0 |
| 90 | 4 | 2 | 2 | 1 | 0 | 2/0 | 3/0 |
| 100 | 4 | 2 | 2 | 1 | 0 | 2/0 | 3/0 |
| 120 | 4 | 2 | 1 | 0 | 2/0 | 3/0 | 4/0 |
| 140 | 2 | 2 | 0 | 2/0 | 2/0 | 4/0 | 4/0 |
| 160 | 2 | 1 | 0 | 2/0 | 3/0 | 4/0 | 4/0+4 |
| 180 | 2 | 1 | 2/0 | 3/0 | 3/0 | 4/0+10 | 4/0+2 |
| 200 | 2 | 0 | 2/0 | 3/0 | 4/0 | 4/0+4 | 4/0+0 |
| AWG/MM Size Conversion | ||||
| AWG | MM | - | AWG | MM |
| 26 | .12826 | 11 | 4.156 | |
| 25 | .162 | 10 | 6.271 | |
| 24 | .205 | 9 | 6.626 | |
| 23 | .255 | 8 | 8.350 | |
| 22 | .322 | 7 | 10.544 | |
| 21 | .411 | 6 | 13.292 | |
| 20 | .516 | 5 | 16.755 | |
| 19 | .653 | 4 | 21.137 | |
| 18 | .823 | 3 | 26.653 | |
| 17 | 1.039 | 2 | 33.606 | |
| 16 | 1.308 | 1 | 42.384 | |
| 15 | 1.652 | 0 | 53.454 | |
| 14 | 2.088 | 00 | 67.399 | |
| 13 | 2.629 | 000 | 84.004 | |
| 12 | 3.302 | 0000 | 104.091 | |
Wire Gauges
Observe Proper Wire Size
The most important wiring practice is to observe proper
wire size. Failure to use adequate size can result in fire.
Even if fire doesn't result, wires that are too small will
cause marginal performance of electrical equipment.
Using the Table
The table shows the wire size required for a 3% voltage
drop in 12 Volt circuits. To use the table, first
calculate the total length of
the wire from the source to the device and back again. Next,
determine the amount of current in the wire. The wire gauge is
found at the intersection of Amps and Feet. In most load circuits,
a 3% drop is quite acceptable. In charging circuits it often pays to
have less of a drop. Always use one size bigger if practical.
Ample Power products are manufactured by Ample Technology,
2442 NW Market St., #43, Seattle, WA 98107 - USA
Visit http://www.amplepower.com