Delta M70A

7 Installation
Grounding the inverter housing
Installation and Operation Manual for Solar Power Inverter M70A EU V1.1 EN 2020-02-20
54
7.4 Grounding the inverter housing
WARNING
High current
► Always observe the local regulations relating
to grounding cable requirements.
► To increase the safety of the system, always
ground the inverter housing even when this
is not required by the local regulations.
► Always ground the inverter housing before
connecting the inverter to the grid and solar
modules.
► The grounding cable cross-section must be
at least 6 mm
2
.
The inverter housing can be grounded at 2
points:
● bottom left at the outer grounding screw
● inside, on the PE screw of the AC connec-
tion
7.4.1 Grounding via the outer grounding screw
1. Screw the grounding cable onto the left side of the inverter
base. The screw, spring washer and washer are already
mounted on the inverter.
Grounding screw: 1 x M10
2. Perform a continuity check of the grounding connection.
→ If there is not a su󰀩ciently conductive connection,
clean the contact surface on the grounding screws or
use a toothed washer if necessary.