Going backwards, I have the socket, about 8' of 6ga wire to the box for the house's extension. The box is in the basement, basically on the other side of the garage wall. In that box I have a 50A breaker. The wiring from the extension box to the main box was done by the prior owner around 2005. We bought the house in 2007. Nothing else was on the circuit now that wasn't on it from September through December when I was charging the red SE. Also, If i am drawing 16A, I dont think the hot tub (which was hooked up this weekend) will bring me anywhere close.
I was able to charge the car at a whopping 2.7 miles of range per hour using the 110 charger that came with the car. I also was able to spend $5 for less than 3KWH at an EVGo charger in the supermarket parking lot. I was hooked up for about 5 minutes. I wanted to see if it would take the charge. They get $3 for the privilege of plugging in.