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first calculate current from power and voltage.

then since wire comes in standard gauges with a maximum current rating for each just select the wire gauge from the table that can carry more current than the value calculated.

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11y ago
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11y ago

Conductors are sized in terms of their cross-sectional area, not 'thickness'. Theoretically, if you divide the power by the voltage, you'll be able to calculate the current. You can then look up an appropriate csa conductor in wire tables. Unfortunately, in practise, it's not as simple as that because cable sizes depend also upon their methods of insulation, the method of installation, whether they are subject to thermal insulation, etc. All these other factors have to be taken into account, too.

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Q: How can you mathematically calculate the wire thickness when the power and voltage is given?
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