reference:awg-iec-wire
AWG-IEC Wire Gauges
American Wire Gauge (AWG) and IEC (mm2) wire sizes are often hard to correlate. There are many references on the internet, but none that gave enough information to make a useful comparison.
| AWG/ kcmil | Area Circular Mils | Amperes | mm2 | ||
|---|---|---|---|---|---|
| TW/UF (60C) | THHW (75C) | THHN (90C) | |||
| 18 | 1620 | – | – | – | 0.8 |
| 16 | 2580 | – | – | – | 1.3 |
| 14* | 4110 | 20 (15) | 20 (15) | 25 (20) | 2.1 |
| 12* | 6530 | 25 (20) | 25 (20) | 30 (20) | 3.3 |
| 10* | 10,380 | 30 | 35 (30) | 40 (30) | 5.3 |
| 8 | 16,510 | 40 | 50 | 55 | 8.4 |
| 6 | 26,240 | 55 | 65 | 75 | 13.3 |
| 4 | 41,740 | 70 | 85 | 95 | 21.1 |
| 3 | 52,620 | 85 | 100 | 110 | 26.7 |
| 2 | 66,360 | 95 | 115 | 130 | 33.6 |
| 1 | 83,690 | 110 | 130 | 150 | 42.4 |
| 1/0 | 105,600 | 125 | 150 | 170 | 53.5 |
| 2/0 | 133,100 | 145 | 175 | 195 | 67.4 |
| 3/0 | 167,800 | 165 | 200 | 225 | 85.0 |
| 4/0 | 211,600 | 195 | 230 | 260 | 107.2 |
| 250 | 250,000 | 215 | 255 | 290 | 126.7 |
| 300 | 300,000 | 240 | 285 | 320 | 152.0 |
| 350 | 350,000 | 260 | 310 | 350 | 177.3 |
| 400 | 400,000 | 280 | 335 | 380 | 202.7 |
| 500 | 500,000 | 320 | 380 | 430 | 253.4 |
| 600 | 600,000 | 355 | 420 | 475 | 304.0 |
| 700 | 700,000 | 385 | 460 | 520 | 354.7 |
| 750 | 750,000 | 400 | 475 | 535 | 380.0 |
| 800 | 800,000 | 410 | 490 | 555 | 405.4 |
| 900 | 900,000 | 435 | 520 | 585 | 456.0 |
| 1000 | 1000,000 | 455 | 545 | 615 | 506.7 |
* Maximum overcurrent protection:
#14 = 15A, #12 = 20A, #10 = 30A
NEC 2007, Chap 9, Table 8,
via Ugly's Electrical Ref 2008, pp71, 73
| IEC mm2 | Circular Mils | Amperes | |
|---|---|---|---|
| Free Air, 70C PVC | In Wall, 70C PVC | ||
| 0.5 | 987 | – | – |
| 0.75 | 1481 | – | – |
| 1.5 | 2961 | 17.5 | 13 |
| 2.5 | 4935 | 24 | 17.5 |
| 4 | 7896 | 32 | 23 |
| 6 | 11,844 | 41 | 29 |
| 10 | 19,740 | 57 | 39 |
| 16 | 31,584 | 76 | 52 |
| 25 | 49,350 | 96 | 68 |
| 35 | 69,090 | 119 | 83 |
| 50 | 98,700 | 144 | 99 |
| 70 | 13,8180 | 184 | 125 |
| 95 | 187,530 | 223 | 150 |
| 120 | 236,880 | 259 | 172 |
| 150 | 296,100 | 299 | 196 |
| 185 | 365,190 | 341 | 223 |
| 240 | 473,760 | 403 | 261 |
| 300 | 592,200 | 464 | 298 |
- IEC 60364-5-52, Table A.52.4
- Fig. G20, http://tinyurl.com/2u3pzqd
Short-time Withstand Rating
Copper conductors and bolted connections withstand rating:
- 1 Ampere for 5 seconds per:
- 30 circular mils (bare wire)
- 42.25 circular mils (75°C insulated wire)
NEC 250-94, 250-95
Conversions
- kcmil = Square Inches x 1273
- kcmil = Square Millimeters x 1.974
- mm2 = kcmil x 0.5067
2007 Erico Cadweld Catalog, Technical Information (page B-4)
AWG mathematical relationships of sizes explained – “Every 3 gauge sizes the resistance, mass per unit, and cross section will double or halve.”
Downloads
| Filename | Filesize | Last modified |
|---|---|---|
| awg-iec_wires.pdf | 8.2 KiB | 2018/05/28 22:28 |
| awg-iec_wires.png | 116.9 KiB | 2018/05/28 22:28 |
| awg-iec_wires.xls | 22.5 KiB | 2018/05/28 22:28 |
reference/awg-iec-wire.txt · Last modified: 2022/07/31 00:00 by Alan Shea