difference between american wire gauge and standard wire gauge
Standard wire gauge SWG was fixed by Order of Council August 23, 1883. It was constructed by improving the Birmingham Wire Gauge. It was made a legal standard on March 1, 1884 by the British Board of Trade. SWG is not to be confused with American Wire Gauge which has a similar but not quite interchangeable numbering scheme.
Pint The imperial pint (≈ 568 mL) is used in the United Kingdom and Ireland and to a limited extent in Commonwealth nations. In the United States, two pints are used: a liquid pint (≈ 473 mL) and a less-common dry pint (≈ 551 mL). Each of these pints is one-eighth of its respective gallon, but the gallons differ and the imperial pint is about 20% larger than the US liquid pint. This difference dates back to 1824, when the British Weights and Measures Act standardised various liquid measures throughout the British Empire, while the United States continued to use the earlier English measure. The imperial pint consists of 20 imperial fluid ounces and the US liquid pint is a measly 16 US fluid ounces, and even though the imperial fluid ounce is 4% smaller than the US fluid ounce, the greater number of them in a pint makes the imperial pint about 20% larger than the US liquid pint.