no sir, search engines isn't banned in my location, and i'am read about BWG on web,
but i was searching for more specializing talking about the topic, thank you
If that is your intention then you really needed to make a bigger better post showing that you have looked and can't understand something or would like a but more explanation of something. Vague questions get vague or no answers.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
Gauges are old measures of thickness. They originated in the British iron wire industry at a time when there was no universal unit of thickness. The sizes of the gauge numbers were the result of the process of wire-drawing and the nature of iron as a substance. Gauges were measured and described in fractions of an inch during the 19th century. In the UK, one gauge was standardised and legally enforced as the Standard Wire Gauge. One important reason for the standardisation of the gauge was the convenience of craftsmen.