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why is the US not Metric
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stefan_trekkie:
You can measure it with calipers (everyone can do that it wants to) and use ..  Пd²/4 and find the aria and it is hard with some multi-core cable cables to do .. But the cables are marked and in sections in stores. (3x2.5mm² CBT ) for example .. power cable with "venelith" isolation (i don't know the word in english :D)
KL27x:
^
--- Quote --- No. I might measure the 10mm^2 as 11. And no one will find my listing. You have to look up the standards. The way you make the standard sound like a measurement can be detrimental, in some ways, when it comes to communication.
--- End quote ---

Plus not all wires are marked outside the insulation. Not all wires have insulation, even. Also great, now you need a superscript font to label your power wires.   >:D
Zero999:
There appears to be come confusion over metric and SI units. All SI units are inherently metric, yet not all metric units are SI. For example the calorie, or more commonly kilocalorie, used for food energy, is a metric unit. It's equal to the amount of energy required to heat a gram of water by 1°C. The SI unit is simply the Joule. The same is true for speeds on road signs, in km/h, which is metric, but not the SI unit for speed which is m/s.
https://en.wikipedia.org/wiki/Calorie

Wire gauges are crap compared to using the cross-sectional area, which does make calculations much easier. Doubling the cross-sectional area, halves the volt, drop, with everything else being equal and I don't need to refer to a table to work out the diameter for a 2mm2 or whatever piece of wire. I can easily calculate it, by rearranging a = πr2 to make r the subject and multiplying by 2: it's simple high school algebra. Granted, it's a little more tricky, for stranded wire, but adding on 15% gives a close approximation and is normally on the large side, which is good in most applications. I'd love to see the back of AWG and SWG and have all cables specified in mm2. It should be a global standard, with no county being the exception.
CatalinaWOW:
Another point of view on the topic of this thread starts with a question.  We mostly all agree that the metric system was designed from ground up to be self consistent and relatively easy to use.  Esperanto is language designed from the ground up to be self consistent and easy to use (regular verbs and all that stuff).  Why doesn't everyone speak Esperanto?

I would assume that the reasons we haven't leaped to metric here in the US are very similar to the reasons that almost no one on this forum speaks Esperanto.  Arrogance isn't number one on the list.  The only difference between Esperanto and metric is that metric does have the advantage of widespread utilization.  But if widespread utilization is the dominant reason for adopting something, why doesn't everyone speak English?  Or Chinese if you want to go by numbers instead of breadth.
GeorgeOfTheJungle:

--- Quote from: Zero999 on January 16, 2020, 09:27:49 pm ---Wire gauges are crap compared to using the cross-sectional area

--- End quote ---

And are backwards: thicker wires have smaller AWG # :o
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