Armoured Cable Size Calculator Repack [QUICK]

70mm² Cu XLPE = 269A (Ref method D, buried). Step 2 (Corrections): Ca=1.04, Cg=0.85, Cc=0.9 → Iz = 269×1.04×0.85×0.9 = 214A (≥150A OK). Step 3 (Vd): mV/A/m for 70mm² = 0.57 mV/A/m → Vd = 0.57×150×120/1000 = 10.26V (2.56% < 5% OK). Step 4 (Adiabatic): Smin = √(10,000² × 0.4)/143 = 44.2mm² → 70mm² OK. Conclusion: Recommended size = 70mm² SWA Cu/XLPE .