HP Integrity Superdome SX1000 Site Preparation Guide, Fifth Edition - HP Integ - Page 54

Raised Floor Metal Strip Ground System, System Installation Guidelines

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Facility Guidelines Electrical and Environmental Guidelines Best Practices • Use a 2ft by 2ft grid. • Flat braid is preferred over round wire. • Exothermic welds are preferred over mechanical connections. • All transformers mounted on the floor should have an X0 bond to floor. • All air conditioning cabinets mounted on the floor with a bonding connection to the floor. • A vertical building steel grounding point is preferred over long wire runs to electrical service entrance. • Very short straps to the floor are preferred over excess lengths. HP recommendations concerning the proper grounding of a raised floor or signal reference grid are closely aligned with other agencies such as the NEC and IEEE. Figure 5-1 Raised Floor Metal Strip Ground System Ground wire to power panel Floor panel Hex bolt Grounding clamp Grounding grid element Band and pedestal Grounding braid to computer equipment 60SP010A 11/30/99 System Installation Guidelines This section contains information about installation practices. Some common pitfalls are highlighted. Both power cable and data communications cable installations are discussed. 46 Chapter 5

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Chapter 5
Facility Guidelines
Electrical and Environmental Guidelines
46
Best Practices
•
Use a 2ft by 2ft grid.
•
Flat braid is preferred over round wire.
•
Exothermic welds are preferred over mechanical connections.
•
All transformers mounted on the floor should have an X0 bond to floor.
•
All air conditioning cabinets mounted on the floor with a bonding connection to the floor.
•
A vertical building steel grounding point is preferred over long wire runs to electrical service entrance.
•
Very short straps to the floor are preferred over excess lengths.
HP recommendations concerning the proper grounding of a raised floor or signal reference grid are closely
aligned with other agencies such as the NEC and IEEE.
Figure 5-1
Raised Floor Metal Strip Ground System
System Installation Guidelines
This section contains information about installation practices. Some common pitfalls are highlighted. Both
power cable and data communications cable installations are discussed.
Ground wire
to power panel
Grounding clamp
Band and pedestal
Grounding braid
to computer equipment
Grounding grid element
Hex bolt
Floor panel
11/30/99
60SP010A