I had my electrician install a nema 14-50 plug to use with the included adapter that came with the model 3. He used a 50 amp breaker and 6/3 wire. After the install, he used a voltage meter on the plug and both sides were reading 120V, so 240V total. It clearly has enough power. However, when I plug in the charger, nothing happens. No lights come on at all. At first I thought it was a problem with the charger, so I tried plugging it into the 14-50 plug in my kitchen that the stove uses. It powered on just fine. The kitchen plug uses a 40 amp breaker. I called Tesla and they don't know what the problem is. What could be going wrong?