| Material | Wire size | Max temp. rise (°C) Max wire temp minus max ambient temp | # in bundle | # carrying current | Single wire ampacity | Total ampacity |
|---|---|---|---|---|---|---|
| 0.0 A | 0.0 A |
I based this calculator off of SAE AS50881, which is a standard for wiring in aerospace vehicles. Among other things, it includes a process for wire sizing based of off how many wires are in the bundle and how many are carrying current.
Per the standard, these calculations only work for frequencies up to 800Hz. Above 800 Hz, skin effect and proximity effects become significant.
In reality, the numbers given here are probably only accurate to the standard by ~5%. The AS50881 standard has some information that is only available through graphs, and it doesn't give the equations, so I've had to reverse-engineer the equations behind the standard.
I've tried to make this reasonably accurate; let me know if you find anything wrong. If you're designing something serious, please refer to the actual standard.