order to transfer specified in the normative document -section solid wire in diameter, use the following formula: D = 2sqrt (S / π), where D - diameter, mm;S - cross-section of conductor mm2 (square millimeters electricians is abbreviated as "squares").
flexible stranded wire consists of many thin strands twisted together and placed in a common insulating sheath.This allows him to break with frequent movements load, which is connected with its aid to the power supply.To find the diameter of a single strand of such a conductor (which can be measured caliper), get the first section of the core: s = S / n, where s - section of one strand in mm2;S - total cross section of the wire (specified in the regulations);n - number zhil.Zatem move the conductor cross-section in the diameter, as describe
d above.
The printed circuit boards are flat conductors.Instead diameter they have a thickness and width.The first value is known in advance of the technical data of the foil material.Knowing it is possible to find the width of the cross section.To do this, use the following formula: W = S / h, where W - width of the conductor, mm;S - cross-section of conductor mm2;h - thickness of conductor mm.
square conductors are relatively rare.Its cross section is to be transferred or length of the side or the diagonal of the square (a caliper can be measured and then, and more).Side length is calculated as follows: L = sqrt (S), where L - length of the side, mm;S - conductor cross-section, then mm2.Chtoby lengthwise side learn diagonal perform the following calculation: d = sqrt (2 (L ^ 2)) where d - diagonal square mm;L - length of the part, mm.
If the conductor cross-section which corresponds exactly required, will not, use a different, having more, but in any case not lower section.Type Explorer, and view its isolation is selected depending on the application.