I have a new Model S which supports 48 amp charging, but how do I get it do charge at 48 amps? I have a 60 amp circuit and I asked my delivery specialists if I should install a NEMA 14-60 receptacle. He said Tesla doesn't have any 14-60 plugs and I should just use the NEMA 14-50 receptacle, which I did. So my Tesla will charge at 40 amps, which I fine, but I'd like to know how to charge at 48 amps.