Silfab Installation Manual

cally grounded in accordance with the instructions
presented below and the requirements of the US
National Electrical Code, Canadian Electrical Code,
and/or any other applicable international standards
and codes.
The module frame must be grounded before
wiring. The grounding connection must penetrate the
frame’s anodized layer.
The grounding should be performed by a
qualified electrician using grounding methods in
accordance with article 250 of NEC or Canadian
Electrical Code requirements CSA C22.1.
• A ground hole is present on each module, marked
with a ground symbol and/or green label.
• Use a 6-12 AWG copper wire only. The bolts, nuts,
flat washers, lock washers or other hardware should
be made of stainless steel.
The bolted or screwed ground connection, should
include the following:
• A screw size of M4 (minimum)/#8 imperial (maxi-
mum)
• A star washer under the screw head or serrated
screw that must penetrate the frame’s anodized
layer.
• A UL-listed grounding lug or UL approved ring
terminal.
• Torque the grounding connections to 25
inch-pounds
The modules can be grounded using third
party grounding devices as long as they are certified
for their intended purpose, have been evaluated and
tested with the system, and the devices are installed
according to the requirements of American NFPA
NEC 70, Canadian CSA C22.1 and/or relevant local
codes and regulations.
*Refer to the appropriate local geographic electrical codes
and regulations for the correct Voc correction factor
according to the respective temperatures. If this informa-
tion is not available, a 1.25 multiplying factor can be used
as default value for correction of Voc.
Use only the same type of connectors, to
ensure reliability of the electrical connection.
For connection of the modules use only
appropriate cables with a minimum conduct
cross-section of 4 mm that is compliant to the
relevant jurisdiction code.
Verify the junction box lid is firmly closed
before installing the module.
Do not repair or reconnect junction box
cable. It may occur spark or electric shock.
Do not bend junction box cable. Under stress,
it can damage the module. Cable bending radius
should be at least more than 4 times the cable
diameter.
Before connection of the system to the grid,
the PV system must be approved for correct installa-
tion, by all appropriate authorities.
Lightning protection is recommended for PV
systems that are to be installed in locations with high
probability of lightning strikes.
The design of the PV system should be done
by a qualified person familiar with PV system design.
Silfab does not assume any responsibility for how the
modules are installed or how the system is designed.
Refer to the tables at the end of this installa-
tion manual for electrical parameters.
9.2 Grounding
A Silfab module with exposed conductive
parts is considered to be in compliance with UL 1703
and/or IEC 61730 and 61215 only when it is electri-
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