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 mm
2
to 25 mm
2
, or solid
wire 1.5 mm
2
to 25 mm
2
. 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 mm
2
, 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 a 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.
Additional requirements apply to UK properties fed from a TN-C-S supply. In most scenarios, these
properties will require an external device which provides PEN fault detection and isolation in accordance
with BS 7671. It is the responsibility of the installer to ensure that the requirements of BS7671 are met -
please refer to Tesla's application note online that discusses this topic in more detail.
NOTE: The use of an dedicated earth rod for the EVSE will not generally be a practical solution to meet the
BS 7671 requirements
CIRCUIT BREAKER RATING / MAXIMUM OUTPUT
10Gen 3 Wall Connector Manual
To Next Page
Loading...
