We have come across many scenarios with the EV Chargers and Tesla Chargers calling for 'Copper Feeders Only'.
What is the reason you need to use only copper, is this due to some form of resistance?
Can you use aluminum feeders to a junction point right before the charger and transition to copper?
After research and collecting data, installing 100's of EV chargers, we have found that the main reason the EV chargers and Tesla Chargers call for copper feeders only, is the terminals where you land your wires are only sized for copper. Aluminum wire rated for a 50 amp charger is #4 aluminum which is larger than the #6 copper that is also rated for the 50 amp charger. This seems to be the only difference between the aluminum and copper feeders for EV and Tesla Chargers. Nothing to do with resistance.
To answer the other question, for very long runs, it is very helpful to run aluminum feeders from you panel to a junction box or means of disconnect before the EV Charger or Tesla Charger and transition to copper to terminate at your charger.
If you are looking to purchase a Tesla charger you can find all of their awesome models here at Tesla Charging!
For a list of the best EV chargers you can check here at List of Best Electric Vehicle Chargers for your home!
You can see more information such as difference between Tesla Charging and Public EV charging compatibility here at this awesome video on charging non Tesla Vehicle at Tesla Supercharger!
You can also see many photos of our installations of EV Chargers and Tesla Chargers on our electrical services pages!
Contact us now for an estimate to install an EV charger at your home or business today!
We are not affiliates of Tesla or any EV manufacturing company. This is only data and experience we have used successfully however U.S. Electric Contractors does not assume any liability and suggest you research each EV install individually.