Cross Sectional Area of a Wire
The table below illustrates the conversion of AWG to MM2 or MM2. US AWG wire gauges.
Expressing The Cross Sectional Area Of Wire With Pi Can Get Numerically Awkward So Here 39 S Another Way Wire Crosses Wire Sectional
A circular mil is the equivalent area of a circle whose diameter is 0001 10-3 inch or approximately 07854 millionths of a square inch.
. Tensile strength then becomes the primary specification parameter in wire with yield and elongation used as. It need not necessarily have to be a circle. The following American Wire Gauge AWG calculator will calculate the diameter in mm inches cross sectional area in mm 2 inches 2 and kcmil or MCM resistance per 1000 feet and per 1000 meters and the current rating in amperes for chassis wiring and power transmission applications.
Here r is the radius half of the diameter of the wire. Resistance in electrical conductors produces heat when electricity is flowing and the amount of heat varies inversely with the cross-sectional area of. Tensile strength is the mechanical property that wire is specified and produced to.
American Wire Gauge AWG Calculator. Its SI unit is Nm 2. These wires include aluminum copper as well as other wire material.
The cross section or the cross sectional area is the area of such a cut. Mils 1000 d 1 where. A n mm 2 π4d n 2 0012668 mm 2 92 36-n195.
American Wire Gauge AWG is the US. AWG - American Wire Gauge Current Ratings - Amp ratings vs. The circular mil is a unit of area used especially when denoting the cross-sectional size of a wire or cable.
The NEC provides a chart that outlines the required size of a ground wire. To calculate the values just select or enter the. First find the diameter of the wire.
Area mm 2 π 4 diameter 2. Because of its lower electrical conductivity aluminium wire requires a 16-times larger cross sectional area than a copper wire to achieve comparable DC resistance. Much easier to use than a wire size chart.
It is denoted as J or q. Its SI unit is kgs-m 2. Momentum flux refers to the flow of momentum across unit area per second.
For example AWG 40 needs 34364 feet. Note that we acquire the resistivity of conductor materials from the table of conductor resistivity and we know now that copper has a resistivity of 172 x 10e-8 ohms per meter. A r ea of the wire in hundredths of a s q u a r e inch.
The American Wire Gauge chart is based on the number of dies originally required to draw the copper down to the required dimensional size. Commercially available wire cable size as cross sectional area. You should remember that higher the gauge the diameter of the wire is smaller and is thinner in appearance.
Circular Mils - AWG vs. It will also help you understand the above. The n gauge wires cross-sectional area A n in square millimeters mm 2 is equal to pi divided by 4 times the square wire diameter d in millimeters mm.
The minimum ground wire size for a circuit that requires protection is usually 200 amps. A Cross-sectional Area in square meters In order to use this general relationship to solve our example problem we require the specific resistance or resistivity of copper. Mass flux refers to the rate of mass flow per unit area.
For example if a steel cross-sectional area of 015 s q u a r e inch per lineal foot is need-ed it can be met with W50 wires on 4-inch centers wires per lineal foot each with a cross-sectional area of 005 square inch. The formula to find the cross-sectional area of the wire in square millimeters is. Steps to Find the Cross-Sectional Area.
The unit of area circular mil cmil is equal to the area of a circle with a diameter of one mil which is a thousandth of an inch 00254 mm. AWG - American Wire Gauge vs. Diameter mil circular mil diameter in mm and area in mm 2.
ρ in ohm-meters 2 times the cross-sectional area A n in square inches in 2. Use the formula above to calculate the width if the AWG is known. Metric Wire Gauges see table below Metric Gauge.
Note that in AWG the diameter goes up as the gauge goes. Welded wire fabric is. Aluminium magnet wire is sometimes used as an alternative for large transformers and motors mainly for economical reasons.
The wire used for a circuit should be at least 3 AWG but it may also be 6 or 4 AWG. Copper Wire - Electrical Resistance vs. As a general rule of thumb for every 6 gauge decrease the wire diameter doubles and every 3 gauge decrease doubles the cross-sectional area.
Standardized wire gauge system used to note the diameter of rounded non-ferrous electrical wiring. Gauge - Gauge weight circular mils and electrical resistance in copper wire. Gauge decrease doubles the wire cross sectional area just like calculating dBs in signal levels.
As the Gauge descends three levels the cross-sectional area doubles. The maximum size for a ground wire should be equal to the cross sectional area of a power conductor. You will then see results for the cross-sectional area wire gauge in AWG and the diameter of the cable.
Mils of circular wire or cable can be calculated as. Much easier to use than a wire size chart. It is to be noted that the greater cross sectional area reduction realized in wire processing narrows the spread between tensile and yield strength.
It means how many feet of wire you will need to reach the one pound of weight. Area kcmil 1000 diameter 2. The formula to find the cross-sectional area of the wire in kilo-circular mils or kcmil is.
In the Metric Gauge scale the gauge is 10 times the diameter in millimeters thus a 50 gauge metric wire would be 5 mm in diameter. 075 mm 2 15 mm 2 25 mm 2 4 mm 2 6 mm 2 10 mm 2 16 mm 2. You can calculate the cross-sectional area of a wire with the formula A πr2.
Our Belden cables and the pairs in instrumentation cable are some of the electrical cables where the conductor size is expressed as an AWG figure. It means the higher the AWG number is the smaller the wire diameter is. This system makes it easy for the designer.
The following table will help you with the conversion of the wire size in square mm cross-sectional area for a copper wire.
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