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To calculate the cross sectional area (CSA) of a cable, you have to use a micrometer to verify its diameter, then divide the diameter by two to get the radius (r). With the radius we can calculate the CSA of the cable.
CSA = pi x r2 (Applicable to solid wires only).
For example:
If a cable is 0.5 cm in diameter, its radius is 0.25 cm.
CSA = 0.196349541 cm2
You will need to decide to how many decimal places it is appropriate to quote your answer.
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