Current Intensity & Wire Thickness: Relationship, Guidelines, Tables for Proper Sizing

Hello. I have such a trivial question, what is the relationship between the intensity of the current and the thickness of the wire needed for this intensity? Any pattern or table?
thanks in advance

I have not heard about the formula, but it is known that higher current = thicker wire. How fat you give is your business. As a reference, I personally took a cable from the computer power supply, because there it flows (to cd and hdd) about 1.5A. Well, but most often I take what is at hand. And it also depends on the length of this cable
And there is a formula for resistance R = width / length * resistivity or something like that.

If you look well on googles, you will surely find something. Greetings

http://www.republika.pl/elemarek/tabele.html

Its resistance depends on the thickness of the conductor (R = ? * l / r R-conductor resistance, ?-specific resistance depending on the material of the conductor, l-its length, r-conductor diameter or its surface area (sorry - this formula was so long ago ...)).
The intensity of the current that flows through it according to Ohm's law is I = U / R.
So if you want more current to flow, you have to either increase the voltage or decrease the resistance. The first formula shows that the thicker the wire, the lower the resistance.

For example, the battery in a car has a constant value, so in order to start it up with jumper cables faster, you need to make them thicker ...

In addition, there are tubes that speak of the maximum current up to a certain wire thickness. The reason for creating such tables is that the conductor heats up as the current flows. The maximum current is one at which the conductor is able to dissipate the heat that is generated on it by itself ...