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'''
The basis of the system is the ''[[thou]]'' or ''mil'' in US English which is 0.001 inch and is different to the millimetre (mm). No. 7/0, the largest size, is 0.50 inch, 500 thou or 12.7 mm in diameter, and the smallest, No. 50, is 0.001 inch, 1 thou or about 25 µm in diameter.
== Table of British Standard Wire Gauges and diameters ==
{| class="wikitable" style="text-align:center"▼
▲{| class="wikitable"
! SWG
! in
! mm
! step
|-
|7/0
|0.
|12.700
|0.036"/gauge
|-
|6/0
|0.464
|11.786
|rowspan=2| 0.032"/gauge
|-
|5/0
Line 29 ⟶ 25:
|-
|4/0
|0.
|10.160
|0.028"/gauge
|-
|3/0
|0.372
|9.449
|rowspan=5| 0.024"/gauge
|-
|2/0
Line 45 ⟶ 43:
|-
|1
|0.
|7.620
|-
Line 55 ⟶ 53:
|0.252
|6.401
|rowspan=3| 0.020"/gauge
|-
|4
Line 67 ⟶ 66:
|0.192
|4.877
|rowspan=4| 0.016"/gauge
|-
|7
Line 73:
|-
|8
|0.
|4.064
|-
Line 83:
|0.128
|3.251
|rowspan=4| 0.012"/gauge
|-
|11
Line 97 ⟶ 98:
|-
|14
|0.
|2.032
|rowspan=5| 0.008"/gauge
|-
|15
Line 117 ⟶ 119:
|-
|19
|0.
|1.016
|rowspan=4| 0.004"/gauge
|-
|20
Line 135 ⟶ 138:
|0.024
|0.610
|rowspan=3| 0.002"/gauge
|-
|24
Line 141 ⟶ 145:
|-
|25
|0.
|0.5080
|-
Line 147 ⟶ 151:
|0.018
|0.4572
|rowspan=2| 0.0016"/gauge
|-
|27
Line 155 ⟶ 160:
|0.0148
|0.3759
|rowspan=2| 0.0012"/gauge
|-
|29
Line 163 ⟶ 169:
|0.0124
|0.3150
|rowspan=9| 0.0008"/gauge
|-
|31
Line 173 ⟶ 180:
|-
|33
|0.
|0.2540
|-
Line 193 ⟶ 200:
|-
|38
|0.
|0.1524
|-
Line 199 ⟶ 206:
|0.0052
|0.1321
|rowspan=10| 0.0004"/gauge
|-
|40
Line 229 ⟶ 237:
|-
|47
|0.
|0.0508
|-
Line 239 ⟶ 247:
|0.0012
|0.0305
|rowspan=2| 0.0002"/gauge
|-
|50
|0.
|0.0254
|}<ref>[http://www.unc.edu/~rowlett/units/scales/wiregauge.html Wire gauge table (U.S./U.K.)] by Russ Rowlett, University of North Carolina at Chapel Hill, 2008</ref>
== See also ==
{{From Wikipedia|American_wire_gauge}}
* [[
== References ==
{{reflist}}
[[Category:
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