Cable Size Calculator
Estimate copper cable cross-section for a 3-phase load — IEC 60364 reference.
Inputs
Result
Full-load current
122.8 A
at 0.85 PF
Recommended cross-section
35 mm² Cu
Ampacity 125 A · derated for tray
Voltage drop
0.77%
3.2 V over 30 m — IEC limit ≤ 3 % motor / 5 % lighting
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Indicative only — final values must be verified against your single-line diagram, applicable standards (IEC 60364 / 61439 / 60947 / 60529 / 60364-5-52) and local regulations.
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