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6.3.2 Cable Specifications
Choose cables according to the rules below:
• All the cables must have sufficient ampacity. The ampacity of the conductor can at least
be influenced by environmental conditions, conductor insulation materials, laying, wire
materials, cross-sectional areas, etc.
• All the cables must be chosen according to the maximum current of the inverter AC and
DC side and enough allowance is required.
• Cables for one side should be of the same type and specification.
• Flame retardant and fire resistant cables are recommended.
Overloading operation of cables is strictly forbidden.
6.4 DC Connection
6.4.1 Checking before Connection
Check the following items before cable connections.
• Check the open-circuit voltage of the PV array to ensure the open-circuit voltage is less
than max. DC voltage of the inverter.
• Mark the negative and positive polarity of the cable.
• Check the PV array for possible ground fault.
Open-circuit voltage of the PV array should not exceed the max. DC voltage of the
inverter. The inverter may be damaged if otherwise.
If a ground fault is detected, remove it before performing any DC connection.
Strictly follow all the instructions when connecting the cables.
Observe all the safety rules specified by the PV array manufacture.
Start the DC connection only when all checks and measurements meet requirements.
6.4.2 DC Cable Connection
Overview
DC wiring terminals are located at the bottom of the DC cabinet.
System Manual 6 Electrical Installation
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