SMA Solar Technology AG 6 Electrical Connection
Installation Manual SB30-50TL-21-IA-en-21 39
6.3.3 Additional Earthing of the Enclosure
If required in the country of installation, you can use the earth terminal on the enclosure to connect a
second protective conductor or as equipotential bonding.
1. Release screw (A) and conical spring washer (B)
half-way. Use an Allen key (AF 4) to do this.
2. Insert the stripped earthing cable (D) under the
clamping bracket (C) (maximum conductor
cross-section 10 mm²).
3. Screw the clamping bracket down as follows:
– Place the conical spring washer over the screw.
The grooved side of the conical spring washer must face towards the screw head.
– Tighten the screw (torque: 6 Nm). Use an Allen key (AF 4) to do this.
☑ The teeth of the conical spring washer press into the clamping bracket. The earthing cable
now has conductive connection to the enclosure.
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