I can't speak for Indian electrical standards, but here in Ireland, we use the UK plug design and most phone chargers (and many laptop chargers) have a plastic/

I can't speak for Indian electrical standards, but here in Ireland, we use the UK plug design and most phone chargers (and many laptop chargers) have a plastic/non conductive ground pin. Ground pins are not used because the chargers are Class II devices[1] with double insulation, and thus do not require a grounding pin. The third pin is still included on our plugs because there are shutters on the sockets which require the ground pin to be inserted first to open the shutters on the live and neutral holes on the socket. [1] https://en.wikipedia.org/wiki/Appliance_classes#Class_II https://en.wikipedia.org/wiki/Appliance_classes#Class_II