I have a Juicebox that was installed, but the electrician also installed a box with the 14-50. I'm not talking about using the cable that came with the Tesla.Perhaps you were referring to the Mobile Connector. The Tesla Gen3 Wall Connector is designed to be hard wired and does not come fitted with a power plug. Tesla does not provide installation instructions for attaching a power plug to the Wall Connector, so adding a power plug to the Wall Connector (which some have done) does not meet code. The Tesla Gen2 Mobile Connector is designed to accept different power plug adapters. The NEMA 14-50 power plug adapter for the Gen2 Mobile Connector enables charging at 240V and up to 32 amps.