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reference:awg-iec-wire
AWG-IEC Wire Gauges
American Wire Gauge (AWG) and IEC (mm2) wire sizes.
| 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: 2023/11/10 00:49 by Alan Shea
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