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In some cases both edges are graduated differently in order to allow comparison between two systems of measurement. A few gauges are made with holes into which the wire has to be thrust. All gauges are hardened and ground to dimensions. In some applications wire sizes are specified as the cross sectional area of the wire, usually in mm 2.
The phase velocity at which electrical signals travel along a transmission line or other cable depends on the construction of the line. Therefore, the wavelength corresponding to a given frequency varies in different types of lines, thus at a given frequency different conductors of the same physical length can have different electrical lengths.
In the North American electrical industry, conductors thicker than 4/0 AWG are generally identified by the area in thousands of circular mils (kcmil), where 1 kcmil = 0.5067 mm 2. The next wire size thicker than 4/0 has a cross section of 250 kcmil. A circular mil is the area of a wire one mil in diameter. One million circular mils is the area ...
For example, one common wire size used in the NEC has a conductor diameter of 0.5 inches, or 500 mils, and thus a cross-section of = circular mils, written as 250 kcmil or 250 MCM, which is the first size larger than 0000 AWG used within the NEC.
For example, for a 500 Ω line, two bare or lacquered wires should be spaced 32× the wires' individual diameters apart – about 4 inches (10 cm) in the case of common 1 / 8 ″ diameter wire (0.125 inches (3 mm)). If the wires are insulated, the separation may need to be a little wider, depending on the insulating plastic.
With straightedge and compass, a diameter of a given circle can be constructed as the perpendicular bisector of an arbitrary chord. Drawing two diameters in this way can be used to locate the center of a circle, as their crossing point. [2] To construct a diameter parallel to a given line, choose the chord to be perpendicular to the line.
Part two in a series, these 4 questions can be a good start to understanding your financial health. ... One relatively quick way to do this is to calculate your net-worth-to-total-assets ratio ...
The diameters are usually much smaller, ranging from 1 ⁄ 10 inch (2.5 mm) to 5 ⁄ 16 inch (7.9 mm) and with suggested working loads of 800 to 7,735 lbf. Because of their size, these cables can be used in pressurized wells making them particularly suited for cased hole logging activities under pressure.
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