Copyright © 2012 CyberPower Systems, Inc.
Installation
5
Grounding Requirements
WARNING!
Shock hazard
The inverter must be grounded by connection to a grounded permanent
wiring system.
AC grounding
The inverter must be connected to a grounded, permanent wiring system
via the inverter ground terminal.
The ground terminal must also be connected to the main utility breaker
panel ground bar and to the house-grounding rod according to
requirement.
Lightning protection
Reduce the risk of lightning damage by using a single-point grounding
system. In this system, all ground lines terminate at the same point. This
point normally is the main utility ground installed by the utility company to
provide a ground for the house wiring. This ground usually consists of a
copper rod driven 1.5 to 2.5 meters (6 to 8 feet) into the earth.
Routing the wires
Preparing for the Installation
Ensure your local utility is consulted for any requirements for connecting to
or returning power to the grid. Obtain all permits necessary to complete the
installation. Consult your local and national electrical codes for more
information.
This section includes the following topic:
1.
Wiring
-
The wires to AC terminal:
Acceptable wire size:
For CPSPV5000ETL: From #10 AWG (4mm
2
to 6mm
2
).
For CPSPV4000ETL: From #12 AWG to #10 AWG (3mm
2
to 6mm
2
).
-
The wires to DC connectors:
Recommended Type:
For PV (+): PV-KBT4/2,5I with 1.5~2.5mm^2 cable (double-isolation)
For PV (-): PV-KST4/2,5I with 1.5~2.5mm^2 cable (double-isolation)
IMPORTANT:
Wiring should be not undersized. Undersized wiring can result in
significant power losses and reduction in system efficiency.
2.
AC Circuit breaker
This breaker must be sized to handle the rated maximum output voltage
and current of the inverter. (Please refer to the inverter specification)
Recommended AC Circuit Breaker:
For CPSPV5000ETL: 32 Amps / 250 Vac.
For CPSPV4000ETL: 25 Amps / 250 Vac.
!
