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NEMA 14-50 or NEMA 6-50: What's the difference?

Step 1. Get a quote from us

Step 2. Accept your quote and schedule the work to be done. 

Step 3. Once work is complete, schedule any inspections that may be necessary.

Step 4. After inspection carefully read Austin Energy's online application

Step 5. Submit copies of the contractor's final receipts or invoices to Austin Energy.

Step 6. Austin Energy will issue a rebate check within 2 to 4 weeks of submission of final paperwork.


Example of outside breaker box with the door open:

What Else Can I Use A NEMA 14-50 or NEMA 6-50 for?

A NEMA 6-50 is a common configuration for welders and kilns. 

A NEMA 14-50 is a common configuration for RVs.

Tesla Wall Connector, NEMA 14-50, or NEMA 6-50 Outlet: What's the difference?

Example of outside breaker box broad view showing the orientation on the garage:

For new electric vehicles, the on-board charger capacity is matched to the vehicle battery. This means that charger can only accept power at its' maximum capacity. For instance, the Tesla Model 3 with a standard battery can only accept a maximum of 32 amps, you wouldn't hurt anything by plugging it into a Tesla Wall Connector that's wired for 48 amps but the car won't charge any faster since the battery doesn't have the ability to accept more than 32 amps at a time. 

​The Model S charges at 23 miles per hour. 

The Model 3 charges at 30 miles per hour. 

The Model X charges at 20 miles per hour. 

The Model Y charges at 29 miles per hour. 

We recommend installing a hardwired charing station. Tesla Wall Connectors are made specifically for Tesla vehicles. They are a level 2 charging station which means that they're connected to 240-volt power and can be connected to a circuit up to 60 amps. The Telsa Wall Connector is a good option for Model 3 long-range, Model S, Model X, and Model Y drivers that drive many miles often. 

NEMA 14-50 or NEMA 6-50



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The Tesla Wall Connector will allow faster charging rates on a 60 amp circuit than using the mobile connector cord with a NEMA 14-50 or a NEMA 6-50 outlet. However, due to electrical code changes the outlet must be GFCI protected. This creates redundant GFCI protection as the car has GFCI protection built-in as well. When the car runs it's self-test cycle of the GFCI in the car, it has a tendency to trip the GFCI breaker and you can't resume charging until you reset the breaker. Due to this, we have been recommending a hardwired charging station instead of a receptacle.

The Model S charges at 34 miles per hour. 

The Model 3 Long Range charges at 44 miles per hour. 

The Model X charges at 30 miles per hour. 

The Model Y charges at 42 miles per hour. 

Tesla Wall Connector

There is only a configuration difference between the NEMA 14-50 and the NEMA 6-50. Both are 50 amp 240-volt outlets that will need an adapter from Tesla to connect to the mobile connector cord. 

Things you need to know about charging with an outlet

NEMA 14-50 or NEMA 6-50: How fast can I charge?

Car Charger Rebate Program through Austin Energy

NEMA 14-50 or NEMA 6-50: How do I charge?

All 240-volt receptacles (6-50, 14-50, 10-30, 14-30, 6-20) have to be GFCI protected now per the 2020 code.  
This creates redundant GFCI protection as the car has GFCI protection built-in as well.
When the car runs it's self-test cycle of the GFCI in the car, it has a tendency to trip the GFCI breaker and you can't resume charging until you reset the breaker.
Due to this, we have been recommending a hardwired charging station instead of a receptacle.
Since there is no receptacle to plug something else in, a hardwired charging station doesn't need a GFCI breaker to be installed if it has integrated GFCI protection, which most do.

We install many charging stations every week including Tesla's wall connector, the ClipperCreek charging stations, and a variety of 240 volt receptacles.  All systems require their own dedicated circuit and run on 240 volts.  Amperages can vary.  The Tesla wall connector has options that allow it to run on up to a 60 amp circuit.  To install a charging station, we’ll need to know what type of power you need and the distance from the breaker box to the location you want the charging station.  Some models require a receptacle to plug the station into, while others are hardwired into the home's electrical system. 

Tesla Wall Connector: How fast can I charge?

Tesla cars come with a second-generation mobile connector. It's a cord that comes with the ability to plug right into an outlet and charge the car with available power. The mobile connector is 20' long and comes with an adapter for a standard 15 amp 120-volt outlet. Although we will hook the outlet up at 50 amps (40 continuous amps) the mobile connector cord can only send 40 amps (32 continuous amps) to the car. 

Get a quote for a Car Charger installation


Useful Information:

  • Find out how to get Austin Energy's Rebate Home Charging Station Rebate Click Here and learn about how you can get up to $1,200 back. 
  • Check for any Federal or State incentives that may apply to you Click Here.

Keep checking back to the Texas Laws and Incentives page for up to date information on grants, tax credits and other programs. Click Here


Find a charging station near you, Click Here

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