Palazzoli Lewden ASPEN Series, User Manual, Page: 15 / 37

• Note 1: The default value for the United Kingdom is (LN / TT, TN-S, TN-
C-S) Fig.3.
• Note 2: If your installation is not covered by the above standard grid types,
please contact Lewden Ltd. for further assistance and confirmation.
• Note 3: United Kingdom wiring regulations BS7671: 2018 section 722
prohibit circuits supplying charge equipment for electric vehicles to
include a PEN conductor (TN-C-S earth arrangement), where the charging
point is located outdoors, or is reasonably expected to be used to charge
a vehicle that is located outdoors.
To overcome this, the local earthing arrangement at the EV charger must
be converted to a TT arrangement by the installation of a separate earth
electrode, or alternatively, the installation must incorporate a protective
device which guards against an open circuit PEN conductor fault.
Reference should be made to BS7671 for further guidance.
Switch 1 (Power Grid Type) Switch 2 (Grounding System)
ON LN IT
OFF LL TT / TN-S / TN-C-S
120V 120V
208V
PE
L1
L2
V/2 V/2
V
PE
L1
L2
0 V
V
PE
L
N
V=240 or 200 volt
EVSE
input Connector
EVSE
input Connector
EVSE
input Connector
V=240 or 230 or 220 or 200 volt
Fig.1 Fig.2 Fig.3
• For dip switch location see A on page 13 of this manual A
Green Power, Green Lifestyle.
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