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A starting point for cable sizing.
Preliminary sizing based on voltage drop. Simple, transparent, with explicit assumptions.
CALCULATED MINIMUM
Next nominal cross-section2.5 mm²A = 2 × L × I × ρ / ΔU
2.03mm²
Next nominal cross-section2.5 mm²A = 2 × L × I × ρ / ΔU
This value is not a final cable selection. Assumes a conductor temperature of 20 °C, unity power factor and negligible reactance. Current-carrying capacity, installation method, ambient temperature, grouping, short-circuit performance and protective coordination must be checked separately by a qualified electrical engineer.