7
WIRING
GENERAL
•
All wiring should be done in accordance with
applicable electrical codes.
•
All wiring should be done by a qualified, li-
censed professional.
•
Wiring should be protected to help ensure
personal safety and to prevent its damage.
•
Please connect each cable after confirming the
polarity of it is correct.
•
Connectors between modules must be inserted
until they click.
•
When connecting the connectors, please make
sure that they are clean and not contaminated
with water, sand etc. Please keep in mind that
if you leave the connector in a non
-
connected
state for a long period of time, contamination is
likely to occur.
•
If an extreme load is applied to the cable, the
cable may come off the junction box or the
connectors. Please be careful that there is no
heavy load applied to the cable.
•
When fixing the cable, make sure that the
minimum bending radius of the cable is 30 mm
or more.
•
Do not disconnect
terminals while modules
generate electricity and connect electrical load
to avoid the hazard of electrical shock.
•
Cable conduits should be used in locations
where the wiring is inaccessible to children or
small animals.
•
These modules contain factory installed bypass
diodes. If these modules are connected to each
other incorrectly, the bypass diodes, cables, or
junction box may be damaged.
•
Please contact your Panasonic Authorized
Representative with questions regarding other
electrical connections if needed.
MODULE WIRING
•
All modules connected in series should be of
the same model number and/or type.
•
The number of VBHNxxxSJ and KJ
modules, that
can be wired in series, is recommended to be
twelve (12) or fewer. If connecting thirteen (13)
modules and more in series, check local tem-
perature conditions to ensure compliance with
maximum system voltage limitations.
•
Do not connect modules in parallel without
using connection devices that connect to ap-
propriate FUSE for each series string or each
module. For the installation of connection
devices, refer to the installation manual of
connection devices.
•
Do not connect modules in parallel without
maximum over current protection.
ARRAY WIRING
•
The term
“
array
”
is used to describe the assem-
bly of several modules on a support structure
with associated wiring.
•
When installing a PV array, the system design
must be completed with reference to the
module electrical specifications for proper
selection of inverters, fuses, breakers, charging
controllers, batteries and other storage devices.
•
Modules are equipped with SMK connectors
(P51
-
5H/R51
-
5) as a terminal enclosure. Use
these SMK connectors for electrical connec-
tions.
•
Use copper wire which is insulated to withstand
the maximum possible system open circuit
voltage. For applications where wire conduits
are used, follow the applicable codes for out-
door installation of wires in conduits. Minimum
diameter of wire conduit is 4 mm
2
. The temper-
ature rating of the conductor is –
40
—
90
°C
.
•
In order to avoid submerging cables and con-
nectors in the water, cables must be fixed
either to the module frame using cable fixing
holes or to the mounting structure. Also, if the
cable is not secured, an external impact may
affect the cable from the outside, and the
module may be damaged.
•
Do not insert
a PV cable between back side and
mounting structure rail. When snow weight is
applied to the module, load may be applied to
the cable.
•
Verify that all fittings are properly installed to
protect cables against damage and prevent
moisture intrusion.
•
We recommend installing a lightning rod and
SPD (Surge protection device) to reduce dam-
age or break
-
down to the PV module caused by
lightning.
•
Check your local codes for requirements.
EARTH GROUND WIRING
Completely ground all modules.
When grounding the modules, please use a hole near
the ground mark displayed on the frame. For metal
parts for grounding, consider a combination that does
not cause corrosion due to dissimilar metal contact.
