ChargePoint Power Block Design Manual page 38

The default Express Plus installation requires service wiring installed underground. Conduit and wire size
are determined based on current. Service wiring in conduit, or armoured cable, must be run as required to
comply with local electrical regulations. Consult national and local codes or a project engineer to determine
the grade, quality and size of the conduit or cable.
The Power Block is available in 250, 330, 350 and 500 A versions, each with its own rating labels.
Note: All wiring and conduit is supplied by the contractor unless otherwise indicated.
IMPORTANT:
If a site requires surface conduit entry installation, contact ChargePoint before
beginning work to obtain an approved installation method. If the station is being fed power by
more than two Power Blocks, surface conduit entry installation is not permitted.
Upstream Components
Charging stations are considered continuous load devices (EVs draw maximum load for long durations).
Therefore, electrical branch circuits to EV chargers must be sized at 125% of the load on each leg of a
3-phase panel for North American installations, in accordance with National Electric Code requirements.
For other regions, refer to local code.
When planning multiple EV charging stations, it is best practice to segment non-continuous and
continuous loads, with all branch circuits for EV charging on a dedicated electrical panel assembly with
adequate circuit breakers. When sizing new electrical panels dedicated for EV charging, all branch circuits
must support continuous load.
Each Power Block requires its own service panel breaker as follows:
Nominal Voltage
Europe: 400 V
North America: 480 V 260 A
Note: The Power Block has a short circuit current rating of 65 kA.
The Power Link 2000 charging station is tested to IEC 61000-4-5, Level 5 (6 kV @ 3000 A) standards.
AC Disconnect Switch
A local AC disconnect switch, separate from the shunt trip wiring, is recommended to be installed between
each Power Block and the electrical panel. This is especially important if the main electrical panel or utility
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Electrical Design
3
Input Current Rating Breaker Size
315 A 400 A
350 A and 400 A
3