D-Link NUCLIAS CONNECT DIS-3650AP User Manual page 15

Mounting
3. A grounding wire is to protect your device from lightning strikes and
the buildup of static electricity. Attach the grounding wire to the
DIS-3650AP using the included screw(M3.9 * 7.8 mm).
4. Tighten the grounding wire (green-and-yellow, 18AWG) to the DIS-3650AP until
it is securely attached.
5. Attach the other end of the grounding wire to either the wall or pole mount.
Ensure that the wall or pole mount is connected to an electrical ground.
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