COMSOL is the developer of COMSOL Multiphysics software, an interactive environment for modeling and simulating scientific and engineering problems.

hi

Calculation of the cross section , entering the diameter d = 2 r:

Formula calculate cross-sectional area from diameter

r = radius of the wire or cable

d = 2 r = diameter of the wire or cable

Calculation of the diameter d = 2 r, entering the cross section :

Formula calculate diameter from cross-sectional area

hi

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Hi

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 = 2 × r to the

circle cross section surface or the cross-section area A (slice plane) to the cable diameter d?

Why is the diameter value greater than the area value? Because that's not the same.

Resistance varies inversely with the cross-sectional area of a wire.

The required cross-section of an electrical line depends on the following factors:

1) Rated voltage. Net form. (Three-phase (DS) / AC (WS))

2) Fuse - Upstream backup = Maximum permissible current (Amp)

3) On schedule to be transmitted power (kVA)

4) Cable length in meters (m)

5) Permissible voltage drop (% of the rated voltage)

6) Line material. Copper (Cu) or aluminum (Al)

COMSOL is the developer of COMSOL Multiphysics software, an interactive environment for modeling and simulating scientific and engineering problems.

Hi

http://www.partnercable.hu/en/services/technical-guide/scaling

pls see this link

http://www.sengpielaudio.com/calculator-cross-section.htm