Installation guide

HIGH POWER WALL CONNECTOR
4
120V ABOVE GROUND
For most branch circuits of 100A, use 3 AWG (26.7 mm
2
), 167°F (75°C)
copper wire. Ground wiring can be a maximum of 4 AWG. If your ground
wiring does not fit into the bus, use a wire nut or other suitable connection
method. For installations less than 100A, use conductors that are sized
according to local electrical codes.
Run 1” (25 mm) conduit on the left side of a wall stud. The conduit fits
into the opening on either the back or the left side of the High Power Wall
Connector as described on page 10.
The service connections described next are primarily used in North
America. For service connections used in Europe and Australia
(sometimes known as “TT Power Grid”), refer to page 6.
Only three wires are connected, but care must be taken that the service
transformer secondary connection is definitely known, and that the three
wires from the main circuit breaker panel are correctly connected and
labeled. The illustrations shown are the most commonly used wiring
formats.
NOTE: The L1, L2, and GND outputs labelled on the illustrations
correspond to the inputs on the High Power Wall Connector.
WARNINGS:
The High Power Wall Connector is a single-phase device. Do not connect all 3 phases
of a 3-phase feed.
Before installing the High Power Wall Connector, identify the type of utility service
connection available on site. If you are unsure about the type of connection available at
the service panel, consult the local utility company, or contact Tesla for assistance.
CAUTIONS:
The two phases used must each measure 120V to Neutral. Earth Ground must be
connected to Neutral at only one point, usually at the Service Entry Breaker Panel.
If a 240V 3-phase feed is from a Delta-connected secondary, the leg used must have a
center tap. This center tap must be grounded. Only the two phases on either side of the
center-tapped leg can be used.
SERVICE WIRING - NORTH AMERICA
Ground connection
Always connect the Neutral at the service to Earth ground. Ground fault
protection is not possible unless the Neutral (center tap on the service
transformer) is connected to an Earth ground.
If Ground is not provided by the electrical service, you must install a
grounding stake nearby. The grounding stake must be connected to the
ground bar in the main breaker panel, and Neutral connected to Ground at
that point.
WARNING: Follow local electrical codes when installing the grounding stake.
220/240V Single Phase
120V
120V
NEUTRAL
(NOT USED)
L1
L2
GND
240V
All illustrations are for demonstration purposes only.