Electronics
AC Module System Installation Manual
Copyright © 2020 LG Electronics.
All Rights Reserved.
37
Rev. 1.0
An example for the grounding method is described below.
Using alternative equipment grounding devices.
•
Determine the size of an external ground wire according to Article 690.45, NEC2014.
•
All bare metal parts should be grounded through the connection of the PV module frame.
•
Alternative Equipment Grounding Devices are classified on a table at
Appendix 3 - Alternative Equipment
Grounding Devices.
•
Those methods and devices are not tested by UL.
•
These alternative grounding devices indicated on the appendix have been evaluated and approved by LG, not by UL.
•
Please follow installation manual for the grounding devices provided by its manufacturer.
The NEC section 690.43 states that "Exposed non-current carrying metal parts of module frames,
equipment, and conductor enclosures shall be grounded in accordance with 250.134 or 250.136(A)
regardless of voltage."
The devices are intended for single use only. Functionality will not be guaranteed if reused.
Samples for grounding
•
These alternative grounding devices indicated on the appendix have been evaluated and approved by LG, not by UL.
•
Please refer to
Appendix 3 - Alternative Equipment Grounding Devices
for alternative equipment grounding devices.
Alternative Equipment Grounding Devices
AC Junction Box
grounding
wire