SMA SC 250U - Manual (Page 29)

SMA America, LLC 5 Installation of the Disconnect Unit
Installation Guide DISU_SCUS-IA-IUS111711 29
5.5 Inserting cables into the Disconnect Unit
1. If you want to lead the grounded DC cables
through the Disconnect Unit: insert the grounded
DC cables through rear openings of the plates and
pull them through the Disconnect Unit to the
inverter.
2. Insert the ungrounded DC cables through rear openings and connect them to the DC load
breaker switches (see section 6.3 ”Connecting DC cables to the Disconnect Unit”, page 33).
3. Insert the AC cables through forward openings and connect them to the AC busbars (see section
6.4 ”Connecting AC cables to the Disconnect Unit”, page 40).
/05*$&
Ingressing moisture caused by insufficient sealing.
Water and moisture can ingress through unsealed openings.
• Use fittings and conduits to seal all openings as required by the National Electrical Code
®
ANSI/NFPA 70.