6g which what tesla recommend for maximum. The builder ran the wire and then confirm with me if we required copper wire which we did. The wire is correct. They did both the Nema 1450 and hardwire with the same type of wire. But I’m glad you asked that, because that 50amp breaker was scolding hot when it tripped. Which make sense. Not sure, but this could be one of reason for issue with fire. Highly doubt it, but, that charger has been 100% fine since install. Never had one issue with our model Y or 3. This is the first time and since we had the model s. This happened possible while were gone. But to change the setting either tesla did it remotely with a firmware update which is dangerous if they did, as that could cause a fire if the breaker didn’t trip. Under no circumstances show it ever be Changed without some confirming that change. Issue like this, I don’t tolerate well. It’s not excuse for that. I would rather it have not allowed charging than change the amp up like that. Then I couldn’t get access to the firmware IP address. Resetting it did nothing, I had to take the faceplate off and wait a few minutes, then it allow me back into it. And sure enough it was set to 48amps somehow. I’ll call tesla energy tomorrow about it. This one is stuck broadcasting its WiFi signal. Now my other wall connector, same exact one for our model Y is working flawlessly.