Sealing Caps; Ac Wire Management At Junction Box; Qd Cable Terminator; Figure 7: Sealing Cap - enphase IQ8D-72-E-US Design Manual

Sealing Caps

Cover any unused QD Cable connector with Enphase
watertight Sealing Caps QD-SEAL-10. Listen for a click as
the connectors engage.
Install Sealing Caps on all unused AC connectors as these
connectors become live when the system is energized.
Sealing Caps are required for protection against moisture
ingress. Please use Enphase Disconnect tool to remove
Sealing Cap.

Figure 7: Sealing Cap

AC Wire Management at Junction box

AC junction box can be used for feeding the AC connection
to Microinverter branch circuit or to splice two sections
of QD Cable/Raw QD Cable together in case of complex
installations with multiple arrays across rooftop. Follow
these recommendations to prevent moisture from
accumulating in the AC junction box. This helps to improve
system reliability while ensuring that the wiring
connections last for the life of the system.
• Make sure that cables enter the junction box from the
side or from the bottom, never from the top where
water can enter the enclosure.
• Install cables with a drip loop. Secure the cable so that
water drains away from the cable entry.
• Use properly sized strain reliefs and cord grips. Note
that the QD Cable is circular with an outer diameter of
11.5 mm (0.45 inches). The cable gland securing the
QD Cable must contain an inner gland sized for QD
Cable.
© 2022 Enphase Energy Inc. All rights reserved.

QD Cable Terminator

Install a terminator (QD-TERM-10) on any cut end of QD
Cable that is not connected to 3 phase AC grid through a
junction box or a 3 phase field wireable connector.

Figure 8: QD Cable Terminator

• Properly tighten the strain reliefs to prevent cable
movement and to prevent water ingress.
• Install the junction box to meet the manufacturer's
recommended mounting and orientation requirements.
Use NEMA 4 enclosures. (NEMA 3 enclosures have
a limited mounting orientation range and may not
accommodate typical rooftop installations.)
• Consider drilling a small drain hole in the bottom,
lowermost corners of the junction box, so that
moisture or condensate can drain out of the junction
box.
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