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E. Enphase recommends that the total percentage of
voltage rise in the AC wiring be a maximum of 2%,
with (an inclusive) less than 1% voltage rise in the QD
Cable. It is recommended to use Center feeding of AC
branch circuit to reduce voltage rise when QD Cable
voltage rise is >1%.
F.
QD Cable is a UL3003 DG (Distributed Generation)
listed cabling system. The DG cable standard UL3003
is based upon the construction specifications (wet
PV Load Center Configuration and Location
A PV load center enables dedicated isolation of the
Microinverter branch circuits and provides a simple
installation platform for the IQ8D Commercial Gateway.
The PV load center should be installed considering both
the cable route and distance to the Microinverters. You can
install the PV load center indoors or outdoors depending
on the electrical layout across the site.
Key Components of PV Load Center
•
PV load center enclosure: The PV Load Center
enclosure may be indoor or outdoor rated, depending
on the installation location of the Load center onsite.
•
IQ8D Commercial Gateway.
•
Dedicated IQ8D Commercial Gateway circuit.
•
Production CTs (Current Transformers).
•
3 Phase Circuit Breakers.
© 2022 Enphase Energy Inc. All rights reserved.
rated) of TC-ER cable, which may be installed in
raceway as per NEC 336.10(3).
G. You must install supports (clips, etc.) for the QD Cable
and Raw QD Cable at 1.8 m (6 ft) intervals or less.
Installation requirements for wet-rated cable allow QD
Cable and Raw QD Cable to be installed in conduits,
cable trays, and other raceways.
Location of PV Load Center
Install the PV load center between the solar PV array
and the existing distribution panel on site. The PV load
center location can be anywhere across the site. However,
consider the following when planning the location:
•
Distance from the existing distribution panel to which
the PV Load center is connected. (Note Vrise and PLC
considerations).
•
Distance from PV arrays to location of PV load center.
•
Conductor sizing of the installed home run cabling
system to the PV Load center.
•
Route length distance on the same circuit between the
first Microinverter and the IQ8D Commercial Gateway:
-
No more than 75 meters (246 feet) between
farthest Microinverter on the branch circuit and the
Gateway.
•
Accessibility for installers and for servicing.
•
Available space for installation
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Troubleshooting
