Indal Handbook For Aluminium Busbar

Indal engineers recommend that for a peak short-circuit current of 80kA, support insulators must be spaced:

✅ – Confirm alloy temper (e.g., 6101-T6, not generic “aluminium”) ✅ Cross-section area – At least 80% of copper equivalent when replacing copper (e.g., 80x5mm Al replaces 50x5mm Cu) ✅ Joint surface finish – Better than 1.6 µm Ra roughness ✅ Inhibitor compatibility – Does it contain zinc chromate or copper flakes? ✅ Thermal cycling test – Simulate 500 cycles from ambient to 105°C and re-check torque ✅ Touch temperature – Handle guards required if busbar exceeds 70°C in accessible areas Indal Handbook For Aluminium Busbar

Covers everything from standard rectangular bars to 4" EH IPS Al. Tubes. Indal engineers recommend that for a peak short-circuit