I am curious, what is the maximum size EGC allowed in the Indian NEC? For that matter, what is the minimum? How strictly is the standard enforced?
maybe Indian electricians liked to make the EGC out of 1x1/4 bus bar for 20A circuits so the government banned the practice to save on copper?
having said that, the place I used to work for did a fair amount of work for a well known engineering company. their spec required every control panel have a lug installed for the #2 EGC that came to every control panel. It did not matter if it was a 15a circuit. It got a #2 EGC.
And then there was the (2) 2/0 lugs that they required on every skid so they could bond all the equipment together with its own LPS that was basically a 2/0 cable that snaked around the whole plant from skid to skid.