IE Rules, 1956
IE Rules, 1960
IE Rules, 1961
IE Rules, 1967
Quality, Quantity, Workmanship, Method of execution
Colour
Tax, Transport, Overhead expenses
Maintenance, Stock, Cost
Silicon
Sulphur
Manganese
Phosphorus
High tension
Super tension
Extra high tension
Extra super voltage
Brief specification
Bulk specification
Detailed specification
Main specification