When an EV charger’s Earth is incorrectly wired to main neutral such as shown below:
EV charger’s
L -> L
EV charger’s
N -> N
EV charger’s
PE -> N
Neither the voltage measurements nor the touch pad with detect such fault.
Failure to follow test instructions on screen may result in hazardous PE wiring undetected.
These conditions are applicable to UK 230 V, US 120V 1 Ph and US 208 V 2 ph.
If the EVCC300 has not detected a problem the instrument will indicate PROCEED. This means it is OK to
proceed to the next tests
If the EVCC300 detects a problem the instrument will indicate FAULT
Should this occur do not proceed with further testing. The charger should be isolated from the mains supply and a
qualified electrician consulted.
The fault could be caused by a number of issues, but they can be summarised as being in one of these three
categories:
Charger is not earthed / grounded
Charger earth / ground connection has a live voltage present
Charger is not able to output a charging voltage. The EVCC300 will apply a C code to enable charging during
the test.
15
Tests
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