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5.Electrical Installation
5.1 Grounding
All module frames must be properly grounded.
Observe all local electric codes and regulations.
A bonding or toothed washer is required to make proper and reliable electrical
grounding connection with the anodized aluminum frame.
Devices listed and identified for grounding metallic frames of PV modules are
permitted to ground the exposed metallic frames of the module to grounded
mounting structures.
Consider using a lay-in lug, rated for outdoor use, if the module grounding
conductor is to be larger than #10 AWG.
When using lay-in lugs, the grounding conductor should be inserted into the
opening indicated in the figure, and secured using the set screw.
Expect for equipment grounding, ET Solar recommends the negative pole of
PV module array is connected to earth during all PV system installations. That
will keep optimal performance of PV Power Plants, which are located in a hot,
high humidity climate and high Maximum System Voltage.
Grounding installation of PV module
5.2 Wire
The junction boxes on each PV module has two wires that terminate in a male
and a female connector. When the modules are to be connected in series, the
male connector should be plugged into the female connector of the
neighboring module while the female connector should be plugged into the
male connector of the other neighboring module.
When connecting parallel modules strings to the distribution box, use proper
third-party PV system connectors with suitable cable which are qualified for
EN50618(or IEC62852 ) All field wiring cables must have large enough cross-
sectional areas approved for use at the maximum short-circuit current of the
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