Install Manual

AC Module System Installation Manual

Rev. 1.0

There is a sample for grounding method as described below.

Using ground holes on PV frames

• Determine the size of an external ground wire according to Article 690.45, NEC2014.

(Grounding conductors smaller than 6 AWG shall be protected from physical damages.)

• All dead metal parts should be grounded through the connection of the PV module frame.

• Each grounding point on each PV frame is identified with ground symbol. The ground symbols are found on PV

frame. This marking is etched directly into the aluminum frame.

• The combination of 2 flat washers, star washer, cup washer, spring washer and M4 size nut and bolt made of

stainless steel is required in order to provide a reliable grounding connection to the module frame.

• Use torque under 4-5N•m.

AC junction box

grounding

wire

• LG AC module includes DC cables in the module’s internal wiring, so no grounding is required for DC input.

• LG AC Modules need to be grounded by using an external grounding equipment conductor. LG does not provide

a grounding conductor.

• The grounding method using ground holes on PV frame is tested and qualified by UL.

Electric connection of the PV Rack and

AC Module

Samples for grounding