I n s t a l l i n g t h e I n v e r t e r
Page 24
Installation Instructions blueplanet XP10U H4 / H6 and XP10U H4 / H6 PSD
7.3.2.6
Connecting the PV array
DANGER
Risk of fatal injury due to electric shock
Severe injuries or death will result if the live connections are touched. When there is irradiance, DC voltage
is present on the open ends of the DC leads.
›
Do not touch the open ends of the leads.
›
Avoid short circuits.
Connecting the PV array
↻
You must remove the gland plate and have holes fabricated to the dimensions of the desired trade size knock outs
from 1/2” to 1”. The XP10U inverter is NEMA 4 rated. KACO requires that you use UL 514B watertight conduit connec-
tion at the conduit entrance.
1.
Strip DC circuit conductors 3/5” per section 7.3.
2. Route the DC circuit conductors to the DC terminals.
3. Connect the DC circuits to the PCB terminals, and in accordance with the PCB labeling.
»
The inverter is connected to the PV array.
7.3.3
Grounding the housing
NOTICE
The XP10U product line construction topology is that of a non isolated (transformerless) inverter.
UL1741 and the NFPA 70 does not require a grounding electrode conductor (GEC), and ground electrode
termination point for non isolated inverters.
UL1741 and the NFPA only require a GEC terminal within the inverter if the inverter bonds the PV system to
ground. Non isolated inverters do not bond the PV system to ground.
The NFPA 70 2011 sec 690.47 covering grounding electrodes contains signifi cant clarifi cations over previous
revisions. Sec 690.47 requires all PV systems to have a grounding electrode system, and details several
methods of compliance.
Further code making dialog for the 2014 also has been presented, which adds additional clarifi cation
stating that ungrounded PV systems can have the their equipment grounding requirements met by the
AC equipment grounding system without the requirement for a DC GEC or grounding system.
An optional grounding terminal is provided inside the inverters as shown in fi gure 11. Ground the housing of the inverter,
if necessary, at the grounding point provided for that purpose in the connection area of the inverter. It is marked with the
symbol.
Figure 11: Grounding point in the connection area
