Keep a physical copy of the Indal Handbook in your panel shop. Do not trust memory. When in doubt about creep, current, or clamping—read the chapter on E91E alloys. Frequently Asked Questions (Based on the Handbook) Q: Does the Indal Handbook recommend silver plating aluminium busbars? A: No. The handbook states that silver plating over aluminium is ineffective due to aluminium oxide. It recommends tin plating or nickel under-plating if a plated finish is required.
Where "k" for E91E grade is listed as (for insulated conductors) and 152 (for bare, uninsulated bars in air). Indal Handbook For Aluminium Busbar
A: Yes, with a minimum bending radius of 2.5x the thickness (for bars up to 10mm thick). The handbook provides stress relief guidelines to prevent cracking. Keep a physical copy of the Indal Handbook