Circuit Breaker Rating / Maximum Output

Power Output

For the best charge rate, install a circuit breaker to match the grid type and desired current output. Wall Connector features built-in RCD Type A + DC 6mA.

Maximum current output (amps) can be programmed by the installer as part of the commissioning process. Any amperage between 6 A and 32 A can be selected. Estimate power output for various grid connections below:

Note

To ensure that the desired current output of Wall Connector can be delivered continuously for multiple hours, a circuit breaker has to be selected that adheres to local regulations and design best practices. The table below provides a guideline for circuit breaker derating to avoid nuisance tripping. Regardless of the breaker size, cables smaller than 4 mm2 stranded should not be used to connect the Wall Connector to the breaker. Please refer to the next page for additional information regarding cable size.

Note

Some Tesla vehicles may draw less current than the max output of Wall Connector. Actual charging rate depends on Wall Connector output and onboard charger in the vehicle. See Tesla website for vehicle specifications.


Maximum current output (A)	Recommended breaker rating (A)	230 V Single-phase power output (kW)	230 V Three-phase delta power output (kW)		400 V Three-phase power output (kW)
Maximum current output (A)	Recommended breaker rating (A)	230 V Single-phase power output (kW)	Model S/X until 2020	Model 3/Y and Model S/X 2020+	400 V Three-phase power output (kW)
32	40	7.4	8.5	11	22.1
25	32	5.8	6.6	10	17.3
20	25	4.6	5.3	8	13.8
16	20	3.7	4.2	6.4	11
13	16	3	3.5	5.2	9
10	16	2.3	2.7	4	6.9
8	10	1.8	2.1	3.2	5.5
6	10	1.4	1.6	2.4	4.1

Note

Refer to local regulations regarding any disconnect requirements.

Note

See Commissioning Procedure for details on how to set maximum amperage.

Branch Circuit Conductors and Earth Wire

Refer to local electrical code to select correct conductors and earth wire size that are suitable for the chosen circuit breaker.
Wall Connector wirebox terminals can accept stranded wire sized between 4 mm² to 25 mm², or solid wire 1.5 mm² to 25 mm². Installer is responsible for selecting a wire size that will be compliant with local code, possibly taking into account amperage, distance and other site conditions.
Note
If using stranded wiring smaller than 4 mm², use a correctly sized ferrule so it can be securely terminated.
For sites with multiple Wall Connectors, each Wall Connector must have its own branch circuit and dedicated circuit breaker.
For outdoor installations, use watertight fittings when securing feeder wires to the wirebox.
For this installation guide, IEC standard colors are used for L1, L2, L3, Neutral, and PE. Some regions may use other standardized colors.

Earth Connections

Wall Connector must have an earth path back to the main equipment earthing point on site. Without a proper earth connection, the Wall Connector will not charge a vehicle during an earth assurance test. Equipment-earth conductor must be run with the circuit conductors and connected to the equipment-earth terminal in the wirebox. Install an earth wire sized according to local electrical code.

Note

To support TT and IT grids, earth assurance can be disabled as part of the commissioning process. Earth assurance must always be enabled for TN grids.