IQ8MC/IQ8AC/IQ8HC Installation and Operation Manual
18 © 2023 Enphase Energy Inc. All rights reserved. September 2023
IOM-00029-1.0
Step 8: Complete the installation of the junction box
A. Connect the IQ Cable to the junction box.
B. Refer to the electrical diagrams
for more information. Conductor colours are listed below:
NOTE: The multi-phase IQ Cable internally rotates L1, L2, and L3 to provide balanced 400 VAC
(multi-phase), thus alternating phases between microinverters.
NOTE: Minimize the number of unused IQ Cable connectors with multi-phase systems. When
cable connectors are left unused on a multi-phase system, it creates a phase imbalance on the
branch circuit. If multiple cable connectors are skipped over multiple branch circuits, the
imbalance will multiply.
Step 9: Connect the PV modules
WARNING: Electric shock hazard. The DC conductors of this photovoltaic system are not earthed
and will be energized when PV modules are exposed to
sunlight.
A. Connect the DC leads of each PV module to the DC
input connectors of the corresponding microinverter.
B. Check the LED on the connector side of the
microinverter. The LED flashes green six times when DC
power is applied.
C. Mount the PV modules above the microinverters.
Single-phase Multi-phase
Brown – L1
Blue – N
Black – L2
Grey – L3
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