Electrical Connection SMA Solar Technology AG
22 WB33_38-IEN101830 Installation Guide
5.3 Connection to the Public Grid (AC)
Cable Sizing
The cable cross-section should be dimensioned so output losses do not exceed 1% at nominal power.
Maximum cable lengths relative to the cable cross-section are shown in the following table:
The conductor cross-sectional area required in individual cases depends on the following factors,
among others:
• Ambient temperature,
•Routing method,
•UV resistance,
•Conduction losses,
• Valid installation guidelines of the respective country (of the installation location).
Cable Requirements
Connection requirements of the utility operator
Always observe the connection requirements of the utility operator.
Cable cross-section Maximum cable length
WB 3300 WB 3800
4 mm² 18.5 m 16 m
Object Description Value
A External diameter 6 mm … 14 mm
B Conductor cross-section 4 mm²
C Strip insulation 8 mm
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