INPUT
Range: 40 down to -3 AWG. Aught sizes are entered as zero and negatives: 0 = 1/0, -1 = 2/0, -2 = 3/0, -3 = 4/0
Sets the resistance basis and the ampacity lookup. Aluminum has recorded ampacity for a few sizes only; other sizes are refused, not estimated.
The column is the conductor insulation rating, not a termination limit. The 75°C copper column is the only one with a screening value for every AWG row.
COMMON AWG SIZES (USA)
CONVERSION RESULTS
AWG Size
14
Area (mm²)
2.08
Diameter (mm)
1.630
Resistance
8.286
Ω/km (copper, 20°C · basis in steps)
Primary-Verified Ampacity
20 A
copper, 75°C column · NFPA 70 (NEC) 2023 Table 310.16 · W0C sparse spot
Separate OCPD Coordination Required
small_conductor_240_4_D — The OCPD limits are primary-verified, but this conductor-conversion result does not select or coordinate a protection device.
Conversion Steps
- 01Input: AWG 14
- 02Cross-sectional area: 2.08 mm²
- 03Diameter: 1.63 mm
- 04Resistance: 8.286 Ω/km (copper, 20°C, tabulated AWG row)
- 05Primary-verified ampacity: 20 A (copper, 75°C column)
- 06Notice: Verified gate: apply the exact NEC 240.4(D) material/size OCPD limit after ambient-temperature and conductor-count corrections.
Formula
Tabulated AWG row (row values reproduce d = 0.127 × 92^((36−n)/39), A = π·d²/4)
QUICK REFERENCE
| AWG | mm² | Ø (mm) | Screening A (Cu 75°C)* |
|---|---|---|---|
| 4/0 | 107.20 | 11.68 | 230 |
| 3/0 | 85.00 | 10.40 | 200 |
| 2/0 | 67.40 | 9.27 | 175 |
| 1/0 | 53.50 | 8.25 | 150 |
| 1 | 42.40 | 7.35 | 130 |
| 2 | 33.60 | 6.54 | 115 |
| 4 | 21.20 | 5.19 | 85 |
| 6 | 13.30 | 4.11 | 65 |
| 8 | 8.37 | 3.26 | 50 |
| 10 | 5.26 | 2.59 | 35 |
| 12 | 3.31 | 2.05 | 25 |
| 14 | 2.08 | 1.63 | 20 |
| 16 | 1.31 | 1.29 | 15 |
| 18 | 0.823 | 1.02 | 10 |
* Unverified copper 75°C screening references from the legacy dataset; they do not follow the material or column selected above. Select conductor ampacity from an applicable verified code pack.