6.H Fire Class Rating
These modules have achieved
a
Fire Resistance Rating of Class C. The fire rating of this module is valid only
when mounted in the manner specified in the mechanical mounting instructions as described in Section 8 of this
document, “Mounting Methods and Configurations”
.
In rooftop installations, installed modules must have a standoff height between roof and module of more than 9cm
[3.54”] for airflow passage
.
Note: During UL testing, the slope of the fire class test for this module is 5 in/ft.
Stando
ff Heigh
t
Module
Roof
Figure 8 Standoff Height
7. Grounding
A module with exposed conductive parts is considered to be in compliance with UL 1703 only when it is
electrically grounded in accordance with the instructions presented below and the requirements of the National
Electrical Code
The company installing the modules will be responsible for professional grounding of the modules. The
factory-provided aluminum frame must be grounded.
All grounding must be performed to be compliant with the latest regulations that are applicable for the jurisdiction
where the system is installed, e.g. the NEC (National Electric Code) in the United States.
If the building is already equipped with an exterior lightning protection system, the PV installation must be
integrated into the protection system against direct effects of lightning
There are eight 4.2mm [
0.165”] grounding holes on the module frame, four on each of the module’s short sides.
The grounding holes are identified by a grounding mark (Figure 9) located next to each hole.
Figure 10 illustrates grounding the module.
Ground wires must be connected to the module’s frame at one of the
grounding holes. The ground wire must not be smaller than No.14 AWG (2.5 mm²), and sized according local
regulations, e.g. the NEC (National Electric Code) in the United States.
The ground holes must be used with M4 screws. The length of these screws must not exceed 20 mm [
0.78”] in
order to avoid contacting the back glass of the module. The screw length must not be less than 12 mm [
0.47”].
The torque to be applied to the M4 screw is 3.0~4.0 N-m [22.1~26.6 in-lb].
The material of the frame is aluminum alloy. To avoid galvanic corrosion, all fasteners (nuts, bolts, washers,
9cm [3.54”]
