Common AWG Wire Gauge Reference
Use this AWG wire gauge reference chart to quickly compare common copper wire sizes, ampacity, and resistance. This page is intended as a fast engineering reference for automation, controls, and electrical design work.
Actual allowable ampacity depends on insulation type, conductor count, ambient temperature, installation method, and code requirements. Always verify final conductor sizing against NEC, local code, and your application conditions.
This quick estimator checks both basic ampacity coverage and a conservative 3% voltage drop screen using round-trip conductor length.
| AWG | Typical Amp Rating | Ohms / 1000 ft | Area (mm²) |
|---|---|---|---|
| 14 | 15A | 2.525 | 2.08 |
| 12 | 20A | 1.588 | 3.31 |
| 10 | 30A | 0.999 | 5.26 |
| 8 | 40A | 0.628 | 8.37 |
| 6 | 55A | 0.395 | 13.3 |
| 4 | 70A | 0.248 | 21.1 |
| 2 | 95A | 0.156 | 33.6 |
| 1/0 | 125A | 0.098 | 53.5 |
Recommended Wire Gauge Estimator
Enter current and one-way distance to get a quick wire gauge recommendation based on a simple ampacity and voltage drop check. This is a practical estimation tool, not a code replacement.
Need help applying this to a real machine?
Get connected with a qualified automation integrator if you need help with controls wiring, panel design, conductor sizing, or troubleshooting real voltage and load issues in the field.
Find an IntegratorWhat to check next
This page is great for a fast first-pass conductor choice, but real wire sizing still depends on installation method, ambient temperature, conductor bundling, terminal temperature rating, startup current, and code rules. A wire that looks acceptable on paper can still be wrong for the installation.
For real electrical design, this page usually works best alongside a more detailed voltage drop calculation and actual device load review so you can confirm both ampacity and delivered voltage at the equipment.