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Check the listing for details. Adapter Cord NEMA 10-30P to 14-50R: for All Level 2 EVs RVs Tesla Heavy Duty 30. Condition: New. Listed at 11.90 USD. Adapter Cord NEMA 10-30P to 14-50R: for All Level 2 EVs RVs Tesla Heavy Duty 30 Amp Dryer to 50 Amp Conversion Adapter ETL UL TSCA Listed STW 10 Gauge. πNEMA 10-30P to 14-50R Adapter: The male plug is a 30AMP NEMA 10-30P, and the female socket is a 50AMP NEMA 14-50R.