Just to add to the above... If you want to prevent somebody from unplugging your J1772 nozzle, the nozzle would need to provide that function. I believe some of the public charging stations can do that. My Leviton nozzle has a hole in the trigger that you could put a small padlock through. Using the padlock would prevent the nozzle from being removed and probably also the charge interruption that can be caused by pushing the trigger.