Oracle 1242, User Manual

Page: 60 / 84

Attach a Grounding Cable for TN Power Systems
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“Attach a Grounding Cable for TN Power Systems” on page 60
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“Attach a Grounding Cable for TT Power Systems” on page 61
Attach a Grounding Cable for TN Power Systems
Rack PDUs achieve earth ground through their power cords. Final chassis ground is achieved
when the power cord is connected to a receptacle, where the ground prong contacts the power
receptacle.
For additional grounding, you can attach a chassis earth grounding cable to the rack. The
additional ground point allows current leakage to dissipate more efficiently.
Caution - The PDU power input lead cords and the grounding strap must reference a common
earth ground. Otherwise, a difference in ground potential can be introduced.
Caution -
If you are unsure of the facility PDU receptacle grounding, do not install a ground
cable until a proper PDU receptacle grounding has been confirmed. If a difference in ground
potential is apparent, you must take corrective action .
Note -
A grounding cable is not shipped with the rack.
1. Ensure that the installation site has properly grounded facility PDUs in the data
center.
The facility PDU must be earth ground.
2. Ensure that all grounding points (raised floors and power receptacles) reference
the facility PDU ground.
Caution -
During manufacturing, the ground cable attachment area might be a painted surface.
Ensure that metal-to-metal solid contact is made for this installation.
3.
Use a T-30 Torx screwdriver to attach the grounding cable to the rack grounding
terminal.
60 Oracle Rack Cabinet 1242 User's Guide • July 2018