Electrical Connection; Wire Requirements; External Grounding Connection - KEHUA TECH SPI-B X2 Series User Manual

PV Grid-tied Inverter SPI-B X2 Series (8K-25K)
User Manual

3.5 Electrical Connection

3.5.1 Wire Requirements

The wiring terminals are located at the bottom of the inverter, as shown in Figure2-5 and Table2-2 .
The recommended wire specification is as shown in Table3-1.
Table3-1 Wire specification
Wire name
PV string input wire
AC output wire
COM. communication wire
Grounding wire

The wires in above table are based on UL copper wire. If other wires are used, please replace
them according to the standard. The wire materials selected by our company have passed the
national standard certification or UL certification.

If the recommended cross-sectional area of wire is not adopted, please confirm with our company.

If using the aluminum wire, it should adopt copper-aluminum transition terminal.

3.5.2 External Grounding Connection

The grounding connection of the external grounding terminal cannot replace the connection of the PE
terminal of AC output wire. Make sure that both of them are grounded reliably.
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Recommended cross-sectional area of wire
2 2
4 mm ~6 mm
 2
5*4mm and above multi-core wire (SPI8K-B X2, SPI10K-B
X2, SPI12K-B X2) .
2

5*6mm and above multi-core wire (SPI15K-B X2, SPI17K-B
X2, SPI20K-B X2).
2

5*10mm and above multi-core wire (SPI23K-B X2, SPI25K-B
X2, SPI25K-B X2P) .
Note: the outer diameter of multi-core wire should be less than
25mm.
8-core network wire
2 2
4 mm ~6 mm
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3 Installation
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