5 | Electrical installation
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Installation instructions sonnenBackup-Box
5.5 Connection to the Backup-Box
5.5.1 Connecting earthing cables
3
4
2
1
2
1
Illustration 10: Connecting earthing cables
Connecting the housing
An earth connection must be established between the housings of the Backup-Box and of
the storage system. This ensures that both housing have the same potential.
Direct the supplied earthing cable through the designated cable gland (3) into the
Backup-Box.
Connect the earthing cable (1) to terminal
13
of terminal strip
X1.B
.
Earthing the Backup-Box
A PE conductor with a cross-section of 10 mm² (CU cross-section) must be installed
between the Backup-Box and the main earthing terminal. This earth connection is required
in application rule VDE-AR-E 2510-2.
Direct the corresponding earthing cable through the designated cable gland (4) into the
Backup-Box.
Connect the earthing cable (2) to terminal
14
of terminal strip
X1.B
.
Connect the earthing cable to the main earthing terminal in the electrical distributor.
