Connecting Power - Ubiquiti unifi switch 8 Quick Start Manual

Grounding (Recommended)
The UniFi Switch is grounded through the Power Adapter.
When powering the switch with PoE, ground the device by
connecting the ancillary ground.
1. Loosen the ground screw and secure a ground wire (not
included) to the grounding point.
2. Secure the other end of the ground wire to a grounding
block or other grounded structure.

Connecting Power

The UniFi Switch can be powered by PoE or DC input using the
Power Adapter.
Power by PoE
Connect an Ethernet cable from an 802.3af/at or 48V passive
PoE power source to the PoE In port.