Electro – Cable Length Calc
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Calculation
For single-phase circuits:
Wire Circular mm2= (Conductor Resistivity)(2)(Amps)(One Way Distance in inch) / Allowable Voltage Drop
For 3-phase circuits:
Wire Circular mm2= (Conductor Resistivity)(2)(Amps)(One Way Distance in inch)(.866) / Allowable Voltage Drop
This is at a temp of 20°C!