Aluminum is 30% the weight of copper, reducing the mechanical stress on supports when the metal expands due to heat.
| Bolt Size | Torque at 20°C (Dry) | Torque at 20°C (Lubricated/Wet) | | :--- | :--- | :--- | | M8 | 18 Nm | 12 Nm | | M10 | 30 Nm | 22 Nm | | M12 | 50 Nm | 35 Nm | Note: For hot applications, retorque after the first heat cycle (when the system hits 80°C and cools down). indal handbook for aluminium busbar hot
Vertically mounted bars allow better natural convection than horizontal bars. 3. High-Temperature Joint Design (Crucial) Aluminum is 30% the weight of copper, reducing
where (A) is the required cross-sectional area, (I) is the short-circuit current, (t) is the fault duration, (Q_1) is the initial temperature, and (Q_2) is the final allowable temperature. Are you designing for indoor or outdoor applications
For a deep dive into specific calculations and engineering charts, it is highly recommended to consult the original Indal technical manuals or modernized guides from Hindalco (which acquired Indal). Are you designing for indoor or outdoor applications? What is the maximum operating temperature ( ∘Craised to the composed with power C What is the desired current (
Aluminium begins to anneal (soften) above 150°C. While it doesn’t melt until 660°C, mechanical creep starts at just 80°C under constant bolt pressure.