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table 5-3 Cable Requirements
No.
Cable
Type
Cable Diameter
Wire Conductor
Cross-section
1
DC cable
Single or multi-core
copper wire comply-
ing with 600 V and
20 A standard
6 mm–9 mm
4 mm
2
–6 mm
2
2
Ethernet cable
CAT 5E outdoor
shielded network
cable
4.8 mm–6 mm
8 * (0.08–0.2)
mm
2
3
Meter RS485 ca-
ble
(1)
Shielded twisted pair
4.8 mm–6 mm
2 * (0.5–1.0) mm
2
4
AC cable
(2)
Outdoor 3-core cop-
per wire cable
10 mm–21 mm
4 mm
2
–6 mm
2
5
External Ground-
ing cable
Outdoor single-core
copper wire cable
4 mm –8 mm
4 mm
2
–6 mm
2
(1) The cable requirements for
COM2
terminal connection are the same.
(2) All the AC wires should be equipped with correctly colored cables for distinguishing.
Please refer to related standards about the wiring color.
It is recommended to use heavy duty conduits when run cables through Cavity
walls, or lay out cables with corresponding conduits. (For “AU” and “NZ”)
5.4
External Protective Grounding Connection
Electric shock!
•
Make sure that the grounding cable is connected reliably. Otherwise, it may
cause electric shock.
•
Since the inverter is not equipped with a transformer, neither the negative elec-
trode nor the positive electrode of the PV string can be grounded. Otherwise,
the inverter will not operate normally.
•
Connect the grounding terminal to the external protective grounding point be-
fore AC cable connection, PV string connection, and communication cable
connection.
•
The external protective grounding point provides a reliable ground connection.
Do not use an improper grounding conductor for grounding, Otherwise, it may
cause product damage or personal injury.
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