Service Wiring - North America - Tesla HPWC Installation Manual

Service Wiring - North America

120V ABOVE GROUND
WARNING: The High Power Wall
Connector is a single-phase device. Do
not connect all 3 phases of a 3-phase feed.
WARNING: 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.
CAUTION: The two phases used must
each measure 120V to neutral. earth
ground must be connected to neutral at only
one point, usually at the breaker panel.
CAUTION: 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.
For most branch circuits of 100A, use 3 AWG
2
(26.7 mm ), 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 11.
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"), see
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 ground outputs labeled
on the illustrations correspond to the inputs on
the High Power Wall Connector.
4
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
. .
NOTE: Illustrations in this document are for
demonstration purposes only.
HIGH POWER WALL CONNECTOR INSTALLATION GUIDE
120V
NEUTRAL
240V
(NOT USED)
120V
L1
L2
GND