Attaching a Grounding Cable
Systems using Oracle PDUs can make connections to either a TN power system or a TT power system. On a TN power system, the earth ground connection is achieved when the PDU power cord ground conductor connects to the facility power distribution earth ground. While you can make a supplementary connection to earth ground through the rack frame, TN power systems do not require this supplementary grounding connection.
 | Caution - On a TT power system, the facility power distribution does not connect to earth ground. You must make an earth ground connection through the rack frame. |