American Wire Gauge or AWG is the standard way of measuring wire gauges in the United States. However, in other countries, they use a different standard of measuring, SWG or British Imperial Standard Wire Gauge, for example. The availability of two different standards has led to a difference in how wire gauges are measured and what standard sizes of wire are used.

AWG

AWG is the standard for measuring wire in the United States. This standard is defined by the diameter of the electrical wire that is being measured. Therefore, it is the physical size is what matters most. Also, the larger the physical size of the wire the smaller the wire gauge according to the AWG measurements.

SWG

SWG was the legal standard for measuring wire in the United Kingdom as of 1884. All of the SWG measurements are in metric sizes. In most cases of use of the SWG measuring standard the sizes will be rounded up which does affect the accuracy.

Similarities

In a lot of ways, AWG and SWG standards are similar. Most noteworthy, both standards are based on the physical size of the wire being measured. Also, both share common wire numbers that express those physical sizes. Finally, metal measuring plates are used to determine the size of the wire.

Differences

The most obvious difference is the standard of measurements. AWG is recorded in what is referred to as the imperial system of measurement. This system of measurements is in inches. Therefore, the American standard is different from the SWG system which uses the metric system of measuring. When looking at the charts below there are slight differences in the calculations between the two systems. Especially relevant is the difference that can be seen between the 12 and 24 gauges. These are very common sizes of wire and the chart shows a very drastic difference amongst the size measurements.

 

Reference charts:

AWG, AWG Wire Gauge Standard Vs. SWG Wire Gauge Standard

 

 

Wire Number
Imperial Standard
Wire Gauge
American
Wire Gauge
gaugeins. dia.ins. dia.
0000000 (7/0)0.5000
000000 (6/0)0.46400.580000
00000 (5/0)0.43200.516500
0000 (4/0)0.40000.460000
000 (3/0)0.37200.409642
00 (2/0)0.34800.364796
0 (1/0)0.32400.324861
10.30000.289297
20.27600.257627
30.25200.229423
40.23200.2043
50.21200.1819
60.19200.1620
70.17600.1443
80.16000.1285
90.14400.1144
100.12800.1019
110.11600.0907
120.10400.0808
130.09200.0720
140.08000.0641
150.07200.0571
160.06400.0508
170.05600.0453
180.04800.0403
190.04000.0359
200.03600.0320
210.03200.0285
220.02800.0253
230.02400.0226
240.02200.0201
250.02000.0179
260.01800.0159
270.01640.0142
280.01480.0126
290.01360.0113
300.01240.0100
310.01160.0089
320.01080.0080
330.01000.0071
340.00920.0063
350.00840.0056
360.00760.0050
370.00680.0045
380.00600.0040
390.00520.0035
400.00480.0031
410.00440.0028
420.00400.0025
430.00360.0022
440.00320.0020
450.00280.0018
460.00240.0016
470.00200.0014
480.00160.0012
490.00120.0011
500.00100.0010
510.00088
520.00078
530.00070
540.00062
550.00055
560.00049

simetric.co

 

Wrapping It Up 

To learn more about American Wire Gauge measurements check out our blog WHY DO WIRE GAUGE SIZES SEEM TO WORK BACKWARDS?

For additional information on the Wire Harness Assembly Process, please click the links below:

You can also receive your own custom wire harness estimate with our Wire Harness Estimator

In addition, click here for an Instant Quote on Braided Ground Straps.

 

0 replies

Leave a Reply

Want to join the discussion?
Feel free to contribute!

Leave a Reply