enphase IQ EV Serie Manuel D'utilisation page 19

IQ EV Charger User Manual
CAUTION: With the delta connection, one leg must be
center-tapped. Only the two phases on either side of the
center tap can be used. The two phases must both measure
120V to Neutral. The third line (L3) of the delta is 208V,
with respect to Neutral, and is sometimes referred to as
a "stinger." DO NOT use this third line! Consult the
transformer manufacturer's literature to be sure the single
leg can supply the required power.
CAUTION: A 3-phase delta-connected transformer
secondary without a center-tap on one leg cannot be used
with the EVSE. No "Neutral" point is available to be
connected to the ground for ground-fault protection.
The EVSE will not allow the contactor to close if it does
not sense the presence of a Ground wire connected to a
"Neutral" point on the transformer secondary.
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