: Typically, aluminium busbars are rated at 0.8 A per sq. mm , whereas copper sits around 1.6 A per sq. mm.
The Indal Handbook provides a (rural, urban, industrial, marine) with specific busbar finishing recommendations for each.
Indal’s formula for DC and AC ampacity is based on three variables:
This is the most referenced section of the handbook. It provides rigorous formulae and tables for determining the current-carrying capacity of busbars. It accounts for:
Here is an overview of the handbook, its core contents, and why it remains a vital reference for modern electrical engineers.