40
Ungrounded System: Connecting Solar Module 
Strings
Wire Cross Sec-
tion of Solar Mod-
ule Strings
The cable cross section for solar module strings should be a maximum of 16 mm² per ca-
ble.
Ungrounded sys-
tem: Connecting 
solar module 
strings
NOTE! To ensure an effective strain relief device for solar module strings, only 
use cable cross sections of the same size.
1
1
6 x
1
1
2
3
4
4
3
NOTE! Finely stranded cables up to conductor class 5 can be connected to the 
DC-side terminals without wire end ferrules.