If Tesla overlooked this requirement and put a 15A plug on their charging cable, then they are liable for any damage caused by their improper cable plug selection and lack of warnings.
You think they're that dumb?
Right from Tesla's site:
NEMA 5-15: Standard Outlet 100V/12A 1.4kW 5km/hour
NEMA 14-50: RV'S And Campsites*, 240V/40A 10kW 46km/hour
NEMA 6-50: Welding Equipment 240V/40A 10kW 46km/hour
NEMA 10-30: Older Dryers 240V/24A 5.8kW 27km/hour
NEMA 14-30: Newer Dryers 240V/24A 5.8kW 27km/hour
Note that the number after the dash for NEMA designations is the max amps. Generally speaking when somebody says '15A connection' or some such, they're talking about the NEMA 5-15 connector, not the amps the car's pulling.
*Interesting:Hit up a RV park or camp site, set up a tent for the night and have a fully charged Tesla in the morning.