Sun Microsystems 15K/9960, Руководство по планировке объекта

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Chapter 4 Facility Power and Grounding Requirements 15
Cabinet Grounding Requirements
The Cluster Platform 15K/9960 achieves earth ground through the power cords. For
this reason, a grounding cable is not provided with the system. The power cords
have three prongs: two for current and one for ground. At the AC input module, the
ground prong, and system chassis are connected. Final chassis ground is achieved
when the power cord is connected to a receptacle, where the ground prong contacts
the power receptacle. For successful grounding, you must provide properly
grounded power receptacles so that the power distribution unit (PDU) ground is
earth ground.
A ground cable can be affixed to the system. While not required, the additional
ground point allows leakage current to dissipate more efficiently. It is important to
note that power cords are grounded through the receptacle and the ground cable
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, corrective action must be taken.
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To Properly Ground the Cluster Platform
15K/9960 System
1. Ensure that you have properly grounded PDUs in the data center.
The PDU must be earth ground.
2. Ensure that all grounding points (raised floors and power receptacles) reference
PDU ground.
Note – You must procure the grounding cable. A grounding cable is not shipped
with the system.