# Wire Gauges

### What is Wire gauge?

Wire gauge is a measurement of wire diameter. This determines the amount of electric current a wire can safely carry, as well as its electrical resistance and weight. The common standard for the diameter (gauge) of round drawn wire is the American Wire Gauge (AWG).
Fig.no.1: Wire Gauge standard measuring device.

### What is American Wire Gauge (AWG)?

American Wire Gauge (AWG) is a U.S. standard set of non-ferrous wire conductor sizes. The "gauge" means the diameter. Non-ferrous includes copper and also aluminum and other materials, but is most frequently applied to copper household electrical wiring and telephone wiring. Typical household wiring is AWG number 12 or 14. Telephone wire is usually 22, 24, or 26. The higher the gauge number, the smaller the diameter and the thinner the wire. Since thicker wire carries more current because it has less electrical resistance over a given length, thicker wire is better for longer distances. For this reason, where extended distance is critical, a company installing a network might prefer telephone wire with the lower-gauge, thicker wire of AWG 24 to AWG 26.

### Wire Gauge vs. Diameter

 AWGgauge ConductorDiameterInches ConductorDiametermm Ohmsper1000 ft. Ohmsperkm Maximum ampsforchassis wiring OOOO 0.46000 11.68400 0.0490 0.160720 380.000 OOO 0.40960 10.40384 0.0618 0.202704 328.000 OO 0.36480 9.26592 0.0779 0.255512 283.000 0 0.32490 8.25246 0.0983 0.322424 245.000 1 0.28930 7.34822 0.1239 0.406392 211.000 2 0.25760 6.54304 0.1563 0.512664 181.000 3 0.22940 5.82676 0.1970 0.646160 158.000 4 0.20430 5.18922 0.2485 0.815080 135.000 5 0.18190 4.62026 0.3133 1.027624 118.000 6 0.16200 4.11480 0.3951 1.295928 101.000 7 0.14430 3.66522 0.4982 1.634096 89.000 8 0.12850 3.26390 0.6282 2.060496 73.000 9 0.11440 2.90576 0.7921 2.598088 64.000 10 0.10190 2.58826 0.9989 3.276392 55.000 11 0.09070 2.30378 1.2600 4.132800 47.000 12 0.08080 2.05232 1.5880 5.208640 41.000 13 0.07200 1.82880 2.0030 6.569840 35.000 14 0.06410 1.62814 2.5250 8.282000 32.000 15 0.05710 1.45034 3.1840 10.443520 28.000 16 0.05080 1.29032 4.0160 13.172480 22.000 17 0.04530 1.15062 5.0640 16.609920 19.000 18 0.04030 1.02362 6.3850 20.942800 16.000 19 0.03590 0.91186 8.0510 26.407280 14.000 20 0.03200 0.81280 10.1500 33.292000 11.000 21 0.02850 0.72390 12.8000 41.984000 9.000 22 0.02540 0.64516 16.1400 52.939200 7.000 23 0.02260 0.57404 20.3600 66.780800 4.700 24 0.02010 0.51054 25.6700 84.197600 3.500 25 0.01790 0.45466 32.3700 106.173600 2.700 26 0.01590 0.40386 40.8100 133.856800 2.200 27 0.01420 0.36068 51.4700 168.821600 1.700 28 0.01260 0.32004 64.9000 212.872000 1.400 29 0.01130 0.28702 81.8300 268.402400 1.200 30 0.01000 0.25400 103.2000 338.496000 0.860 31 0.00890 0.22606 130.1000 426.728000 0.700 32 0.00800 0.20320 164.1000 538.248000 0.530 Metric 2.00 0.00787 0.20000 169.3900 555.610000 0.510 33 0.00710 0.18034 206.9000 678.632000 0.430 Metric 1.80 0.00709 0.18000 207.5000 680.550000 0.430 34 0.00630 0.16002 260.9000 855.752000 0.330 Metric 1.60 0.00630 0.16002 260.9000 855.752000 0.330 35 0.00560 0.14224 329.0000 1079.120000 0.270 Metric 1.40 0.00551 0.14000 339.0000 1114.000000 0.260 36 0.00500 0.12700 414.8000 1360.000000 0.210 Metric 1.25 0.00492 0.12500 428.2000 1404.000000 0.200 37 0.00450 0.11430 523.1000 1715.000000 0.170 Metric 1.12 0.00441 0.11200 533.8000 1750.000000 0.163 38 0.00400 0.10160 659.6000 2163.000000 0.130 Metric 1.00 0.00394 0.10000 670.2000 2198.000000 0.126 39 0.00350 0.08890 831.8000 2728.000000 0.110 40 0.00310 0.07874 1049.0000 3440.000000 0.090