There is a dryer 220 line in the garage with a 4-30R receptacle. The Audi E-tron 'power charger' has a 220 cord with a 6-50P plug. Can the y-split cord below (4-30P would plug into wall receptacle; 4-30R receptacle is for the existing dryer; the 6-50R receptacle is for the Audi power charger) be used SAFELY? The dryer and the charger would not be used at the same time.
https://getwiredusa.com/product.sc?productId=959&categoryId=-1
https://getwiredusa.com/product.sc?productId=959&categoryId=-1