LG Electronics LGENBOX-01, LGxxxA1C-B3 installation instructions Grounding

3-9 Grounding

Check your information below before grounding.

Notice

•Grounding is largely classified into equipment grounding and neutral grounding. The purpose of the equipment grounding is to prevent electric shock from contact with metal parts. Equipment grounding allows the abnormal current to flow from the equipment to the earth.

•The equipment grounding conductor and the neutral conductor are separated. Depending on the local code, connection between the equipment grounding conductor and the neutral conductor may be required in the distribution panel.

•The neutral conductor of LG AC module is built into the AC cables. (For neutral grounding, refer to Chapter 3-10. Connecting AC Module Array-to-Distribution Panel)

•In a place with frequent lightning storms, by installer, an auxiliary grounding may be connected directly from the AC module system to the ground.

•To form an effective equipment grounding path, do not make any unnecessary paths.

•Practice according to the local electricity code.

•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.

Form the equipment grounding path from AC module to the grounded distribution panel with one connection in the following order:

Step 1. To form the effective grounding path, connect the one of points marked of a PV frame, point, to the PV rack. To electrically connect, it recommends that you use one M4 stainless steel bolt, one nut, one spring washer, two flat washers, one cup washer and, one star washer. (Minimum torque : 4~5 Nm)

Electric connection of the PV rack and PV module

Module frame

Bolt

Flat washer

Star washer

Cup washer

Grounding wire

Flat washer

Spring washer

Nut

Step 2. Connect an equipment grounding conductor from AC module arrays to AC junction box, to form one equipment grounding system. (For grounding method, refer to next page’s Samples for Grounding)

※The installation instructions shall include:

1.Wiring must be compliant with NEC Article 705.

2.Grounding methods must be compliant with NEC Article 250.

3.CNL model instruction manuals shall also include a statement that installation shall be inaccordance with CSA

C22.1, Safety Standard for Electrical Installations, Canadian Electrical Code, Part1.

WARNING

•Do not use bare-copper grounding lugs for grounding. The lugs can corrode which could result in a faulty ground circuit thereby, posing risk for electric shock, electrocution or fire hazard.

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