Tefzel Wire Amperage Chart
One of the most common questions we get is how many amps Tefzel wire is rated for. That is hard to answer without knowing many variables, so treat the table below strictly as a general guide. Each application, whether communications, control or power, needs to be examined and all appropriate safety factors considered.
Keep in mind that as your Max Feet decreases, your amperage rating increases.
The chart below suits most motorsport, automotive and industrial applications. It assumes your wires are bundled in heat-shrink and that you are using one of these wire types:
For single wires in free air (not bundled), use the Aerospace & Defense Singles Ampacity Rating (PDF, 157 KB).
Ampacity Chart
| AWG | Milliohms / ft | 35°C Rise | 10°C Rise | ||
|---|---|---|---|---|---|
| Amps | Max Feet | Amps | Max Feet | ||
| 2 | 0.156 | 100 | 44 | 54 | 83 |
| 4 | 0.249 | 72 | 39 | 40 | 70 |
| 6 | 0.395 | 54 | 33 | 30 | 59 |
| 8 | 0.628 | 40 | 28 | 20 | 55 |
| 10 | 1 | 30 | 23 | 15 | 47 |
| 12 | 1.59 | 20 | 22 | 12.5 | 35 |
| 14 | 2.53 | 15 | 18 | 10 | 28 |
| 16 | 4.01 | 12.5 | 14 | 7 | 25 |
| 18 | 6.39 | 10 | 11 | 5 | 22 |
| 20 | 10.2 | 7 | 10 | 4 | 17 |
| 22 | 16.1 | 5 | 7 | 3 | 15 |
Chart data courtesy of RB Racing, the best website for in-depth information on motorsport wiring.