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Sales Office
4th Fl., First Tower,
55, Bundang-ro, Bundang-gu,
Seongnam-si, Gyeonggi-do,
13591 Korea
Factory
313, Soi-ro, Soi-myeon, Eumseong-gun,
Chungcheongbuk-do 369-872, Korea
5. Wiring
5.1 General
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All wiring should be matched with acceptable regional and local electrical codes.
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All wiring work should be done by certified and authorized engineers.
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All wiring should be connected safely in order to prevent any hazard.
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All PV modules for one serial connection must be identical in terms of output and in types.
·
Do not connect PV modules directly in parallel without the combine box.
5.2 Module Wiring
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System voltage should not exceed the maximum system voltage of module.
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The maximum number of modules in parallel connection depends on inverter’s capacity.
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PV modules are not designed to be connected to load directly. Therefore, a proper inverter must be
connected.
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Bypass diodes are installed on the modules at the factory. Wrong connection may cause damage to
the bypass diodes, cable and junction box.
·
The value of Isc and Voc marked on modules should be multiplied by 1.25 when determining module
voltage ratings, conductor current ratings, fuse size and the size of controls to the PV output
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 local codes.
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 3)
Common grounding hardware (nuts, bolts, star washers, split-ring lock washer, flat washers and the
like) is used to attach a listed grounding/bonding device. The attachment must be made in
conformance with the grounding device manufacturer's instructions.
Common hardware items such as nuts, bolts, star washers, lock washers and the like have not been
evaluated for electrical conductivity or for use as grounding devices and should be used only for
maintaining mechanical connections and holding electrical grounding devices in the proper position for
electrical conductivity. Such device, where supplied with the module and evaluated through the
requirements in UL 1703, may be used for grounding connections in accordance with the instructions
provided with the module.