ChargePoint Power Block Design Manual page 41

Maintenance Switch
A maintenance switch is highly recommended when more than one Power Link 2000 stations are
connected to one or multiple Power Blocks to improve system uptime during maintenance.
For Power Link 2000s that do not have a maintenance switch, servicing the station requires the Power
Block upstream to be powered off. This can affect system uptime and fleet scheduling. If an external DC
disconnect switch is used, then the switch must be configured with Normally Closed (NC) contact feedback
wired into each Power Link 2000. Maintenance switches are an orderable option for pedestal stations.
Conduit and Wiring Requirements
For full product specifications, refer to the Express Plus Datasheet. Using that data, ensure the installation
location is equipped with service wiring that supports the Express Plus site's power requirements:
IMPORTANT: All AC and HV DC conductors landing on Express Plus equipment shall be copper
and rated to 90°C (194°F) minimum. All 48 VDC conductors must be rated to 75°C (167°F)
minimum and 90°C (194°F) is recommended.
In regions that use conduit, the outer diameter of conduit must not exceed the trade sizes listed.
In regions that do not use conduit, armoured cable may be laid in the same configuration to conform to the
wire placement on mounting templates.
Note: For North American installations, per UL 2202, overhead configurations of the Power Link 2000 must
use no more than 3 conductors per pole, and those three conductors cannot be larger than 85 mm
AWG). Reference UL code for wire bend limitations for 203 mm (8 in) of available space.
Notes for all wiring regions:
Use one AC input feed per Power Block.
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The maximum wiring run length is 100 m (328 ft) between a Power Block and each of its Power Link
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2000s for DC conductors, 48 VDC wiring and Ethernet.
48 V DC wiring must be rated for 1000 V.
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Power Link 2000 conduits must be sealed to maintain a Pollution Degree 2 environment.
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Ethernet communication between Power Blocks and Power Link 2000s must be outdoor rated Cat6
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Shielded Twisted Pair (STP) cable, with the shield wire terminated at the Power Block end. Lesser
grades of cable do not have the required noise immunity.
All sizes are generic and provided for reference only. The installation contractor must perform site-
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specific wiring, taking into account the installation method, current carrying capacities, site
conditions and applicable regulations.
Maintenance Switch
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