Electrical Installation
General Wiring
• LG Electronics recommends that all wiring be double
insulated with a minimum rating of 90
°
C (194
°
F).
• All wiring should use a flexible copper (Cu) conductor.
• The minimum size should be determined by the
applicable codes.
• LG Electronics recommends a size no smaller than
4mm
2
.
Earth Grounding
• The solar modules from LG Electronics meet the
conditions of safety class II. Therefore grounding is not
mandatory. However grounding is recommended. Also,
equipotential bonding must be realized. All work must
be conducted in conformance with all Federal, State,
and local codes and standards.
• Grounding works should be performed by an
authorized installer for the safety and maintenance of
the system in accordance with all national, state and
local electrical codes and regulations and standards.
• Specific information on the solar module dimensions
and location of grounding holes is provided in
“Product
Specifications”.
• One M4 stainless steel bolt, one nut, one spring
washer, two flat washers, one cup washer, one star
washer and 12 AWG Cu wires are recommended per
mounting hole.
•
Where common grounding hardware (nut, bolts,
washers) is used to attach a listed grounding device,
the attachment must be made in conformance with the
grounding device
manufacturer‟s instructions.
• There is an earth hole on the edge of the module
frame. Using this hole, an earth conductor and the
solar module frame may be recommended to be
connected and earthed as the below drawing.
• All screws and nuts shall be tightened to a torque of
4~5 Nm.
• A module with exposed conductive parts is considered
to be in compliance with UL 1703 only when is
electrically grounded in accordance with the instructions
presented below and the requirements of the National
Electrical Code.
The installation instructions shall include:
1.
Details for wiring shall comply the NEC Article 690.
2.
Details for the grounding method of the frame of
arrays shall comply with the NEC Article 250.
3. CNL model instruction manuals shall also include a
statement that installation shall be in accordance
with CSA C22.1, Safety Standard for Electrical
Installations, Canadian Electrical Code, Part 1.
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