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IQ EV Charger User Manual
CAUTION: This is a single-phase device. DO NOT
connect all three phases of a three-phase feed! You
may use any two phases of a three-phase wye-transformer
feed. The center point of the three phases (usually used as
Neutral) must be grounded somewhere in the system. A
Neutral connection is not required by the EVSE. Only Line
1, Line 2, and Ground are required, as shown in Figure 3.
CAUTION: The two phases used must each measure
120 V to Neutral. Earth Ground must be connected to
Neutral at only one point, usually at the service entry
breaker panel.
CAUTION: If a 240 V three-phase feed is from a Delta-
connected secondary, the leg used must have a center-tap.
That tap must be Grounded. Only the two phases on either
side of the center-tapped leg can be used. See Figure 4.
CAUTION: The warranty is void if this unit is not wired
properly.
WARNING: Only a qualified electrician should perform
the installation. The installation must be performed in
accordance with all local electrical codes and ordinances.
Only three wires are connected, but ensure that the service
transformer secondary connection is known and the three wires
from the main circuit breaker panel are connected and labeled
correctly. Figures 2, 3, and 4 show the most common service
transformer secondary wiring formats.
Notice that L1, L2, and Ground are labeled on each diagram.
Those transformer outputs correspond to the same inputs on
IQ EV Charger. Also, the two three-phase diagrams show an L3
output, which is not used. DO NOT connect all three phases of a
three-phase secondary to the EVSE. This is a single-phase device.
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