Electrical Cable
Electrical Cable Cross section is just a two-dimensional view of a slice through an object.
An often asked question: How can you convert the diameter of a round wire d to the circle cross section surface or the cross-section area A (slice plane) to the cable diameter d?
Resistance varies inversely with the cross-sectional area of a wire. |
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Top of Form | Wire diameter d | unit | | | Cross-sectional area A | unit2 | | | | | ↓ | | | | ↓ | | | | | | Cross-sectional area A | unit2 | | | Wire diameter d | unit | | | | | | | |
Bottom of Form
The "unit" can be inches, feet, yards, meters (metres), centimeters, or millimeters. Litz wire consisting of many thin wires need a 14 % larger diameter compared to a massive wire Cross section is an area.
Diameter is a linear measure.
That cannot be the same. The cable diameter in millimeters is not the cable cross-section in square millimeters. | | The cross section or the cross sectional area is the area of such a cut.
It need not necessarily have to be a circle.
Commercially available wire (cable) size:
1.5 mm2, 2.5 mm2, 4 mm2, 6 mm2, 10 mm2, 16 mm2. | Calculation of the cross section A, entering the diameter d:
r = radius of the wire or cable d = diameter of the wire or cable Calculation of the diameter r, entering the cross section A:
There is no exact formula for the minimum wire size from the maximum amperage.
It depends on many circumstances, such as for example, if the calculation is for DC, AC or even for three-phase current, whether the cable is released freely, or is placed under the ground. Also, it depends on the ambient temperature, the allowable current density, and the allowable voltage drop, and whether solid or litz wire is present. And there is always the nice but unsatisfactory advice to use for security reasons a thicker and hence
An often asked question: How can you convert the diameter of a round wire d to the circle cross section surface or the cross-section area A (slice plane) to the cable diameter d?
Resistance varies inversely with the cross-sectional area of a wire. |
-------------------------------------------------
Top of Form | Wire diameter d | unit | | | Cross-sectional area A | unit2 | | | | | ↓ | | | | ↓ | | | | | | Cross-sectional area A | unit2 | | | Wire diameter d | unit | | | | | | | |
Bottom of Form
The "unit" can be inches, feet, yards, meters (metres), centimeters, or millimeters. Litz wire consisting of many thin wires need a 14 % larger diameter compared to a massive wire Cross section is an area.
Diameter is a linear measure.
That cannot be the same. The cable diameter in millimeters is not the cable cross-section in square millimeters. | | The cross section or the cross sectional area is the area of such a cut.
It need not necessarily have to be a circle.
Commercially available wire (cable) size:
1.5 mm2, 2.5 mm2, 4 mm2, 6 mm2, 10 mm2, 16 mm2. | Calculation of the cross section A, entering the diameter d:
r = radius of the wire or cable d = diameter of the wire or cable Calculation of the diameter r, entering the cross section A:
There is no exact formula for the minimum wire size from the maximum amperage.
It depends on many circumstances, such as for example, if the calculation is for DC, AC or even for three-phase current, whether the cable is released freely, or is placed under the ground. Also, it depends on the ambient temperature, the allowable current density, and the allowable voltage drop, and whether solid or litz wire is present. And there is always the nice but unsatisfactory advice to use for security reasons a thicker and hence