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By the diameter of the wire.

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Q: How is the circular mil area of a round wire determined?
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Is copper wire measured in circular mills?

Sometimes. Circular mills is a way of measuring wire size. It's a measurement of area. It's used to state the cross sectional area of round wire, because the current (electricity) carrying ability of wire is related to this area. In the U.S. wire gauge (18 gauge, 14 gauge, etc.) is used to state wire sizes until they become large. Large sizes (larger than 0000 gauge maybe) are stated in circular mills, but the size of any wire could be stated in circular mills.


Why are wires cylindrical?

It's easy to draw wire through a cylindrical die to make it. That and the fact that current that flows through the wire is depended on the wire cross section area, the circular shape is the maximized area for a given amount of material; therefore, a cylindrical wire is much more efficient.


A conductor thats described as a 750 mcm wire has an area of?

750,000 circular mils. A wire that is 1 mil (.001 inches) in diamter is defined to have an area of 1 circular mil. The area in circular mils = (diameter in mils) ^ 2. To convert this to area in square inches, multiply 750,000 * pi / 4,000,000 = 0.589 sq in.


What does 250kcmil AWG mean?

It is a wire size, the equivalent cross sectional area in thousands of circular mils. e.g. 500 MCM or kcmil = 500,000 circular mils. The circular mil is a unit of area used especially when denoting the cross-sectional size of a wire. It is the equivalent area of a circle whose diameter is 0.001 (10-3) inch. AWG stands for American Wire Guage.


Write a formula used to find circular mil area?

The ddiameter of No. 14 wire is 64 mils. What is its area in CM and in SM?


How do you calculate mils to circular mils?

1 circular mil = 1 mil x 1 mil a=d2 so if a wire has a diameter of 80 mils, it has an area of 6400 circular mils.


Calculate cross sectional area of wire?

If the wire has a circular cross-section - the usual case - use the formula for the circle: pi x radius squared.


How do you work out the cross-sectional area of a wire?

Imagine the wire is straight, now cut through at right angle to the centre line, the exposed surface is the cross sectional area, on a round wire it = pi * radius2 (area of a circle)


How are electrical wire sizes measured?

The amperage capacity of a wire is determined by the cross sectional area of the wire.Another AnswerElectrical conductors are expressed in terms of their cross-sectional area. In Europe, for solid conductors, this is expressed in square millimetres. Stranded conductors are expressed in terms of the number of strands, and the diameter (in millimetres) of each strand, expressed in the format A/B (where A = number of strands, and B = diameter of strand) -from which the total area, in square millimetres can be determined.In North America, the cross-sectional area is expressed in circular mils (round conductors) or square mils(rectangular conductors). A 'mil' is one-thousandth of an inch. A 'circular mil' is the diameter of a conductor, expressed in mils, squared -so it is not really a measure of area (as it doesn't take pi into account), but a figure that represents an area.


How do you calculate armoured cable cross-sectional area?

For electrical purposes the formula for calculating the circular-mil area of a circular wire is very simple. A = D squared, Area equals diameter of the cable or wire squared. This calculation is needed when pulling cables into a cable tray so as not to overfill the tray. Over filling a cable tray will build up a heat from the cables if proper ventilation between the cables is not maintained.


What mcm wire?

MCM is another measure of wire gauge. It is somewhat confusing but it starts at around 40 gauge being the smallest wire up to the largest gauge of 1. from there you have oughts which is from 1 to 4 (1 ought, 2 ought etc) and then you have MCM which is circular mils. MCM can range from something as small as 250 mcm up to 2000 mcm.Another AnswerThe abbreviation, 'MCM', stands for 'thousand circular mils'. A 'circular mil' is a North-American method of measuring the cross-sectional area of a circular-section conductor (Europeans use square millimetres for conductors of anyshape).A 'circular mil' is obtained by squaring the diameter of a circular-section conductor, expressed in mils. A 'mil' is one-thousandth of an inch. As the constant, 'pi', isn't taken into account, it should be obvious that a circular mil is, therefore, a figure representing a cross-sectional area, rather than a true measure of that area.If necessary, in order to obtain a true cross-sectional area, circular mils can be converted into square mils.


What is mcm wire?

MCM is another measure of wire gauge. It is somewhat confusing but it starts at around 40 gauge being the smallest wire up to the largest gauge of 1. from there you have oughts which is from 1 to 4 (1 ought, 2 ought etc) and then you have MCM which is circular mils. MCM can range from something as small as 250 mcm up to 2000 mcm.Another AnswerThe abbreviation, 'MCM', stands for 'thousand circular mils'. A 'circular mil' is a North-American method of measuring the cross-sectional area of a circular-section conductor (Europeans use square millimetres for conductors of anyshape).A 'circular mil' is obtained by squaring the diameter of a circular-section conductor, expressed in mils. A 'mil' is one-thousandth of an inch. As the constant, 'pi', isn't taken into account, it should be obvious that a circular mil is, therefore, a figure representing a cross-sectional area, rather than a true measure of that area.If necessary, in order to obtain a true cross-sectional area, circular mils can be converted into square mils.