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5.3 Array Wiring
'Array' is defined as a module arrangement with combined electrical connection. The array must be
insulated to resist against the possible maximum open-circuit voltage. Also, solar irradiation-proof
copper wires must be used for array wiring. Installers must check the local electrical specifications. In
order to prevent cable drooping, installers should fix cable using wire or duct.
5.4 Earth Ground Wiring
To prevent electric shock and fire, an earthing must be done on the frames of PV modules and array.
The array frame must be earthed according to NEC Article 250 (USA) or CEC (Canada). There is an
earthing hole in the module frame; by using these holes, an earth conductor and the module frame
must be connected and earthed. (See picture 6)
1) Grounding using Lay-in Lug
It is necessary to ground module at earth hole (4.2mm / all frame) using GBL-4DBT Lay-in lug of
ILSCO or a product certified of quality above. In order to connect module frame and Lay-in-lug electric
more effectively, installers should use external saw tooth type washer or saw tooth type Lug and torque
wrench(Torque level: 1.5 N·M).
The material for bolt, nut, washer and lug should be stainless steel.
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Picture 6. Grounding Hardware
Picture 7. Lay in Ground Lug
Page 11 of 16
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