HP rp7400, Hardware Manual

Page: 40 / 162

Specify Raised Floor Requirements
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Connect each pedestal to four strips using 1/4 in. (6.0 mm) bolts tightened to the manufacturer’s torque
recommendation.
• Good — Use the raised floor structure as a ground grid. In this case, the floor must be designed as a
ground grid with bolted down stringers and tin-lead or zinc plating (to provide low resistance), and
attachment points for connection to service entrance ground and HP N4000 server equipment. The use of
conductive floor tiles with this style of grid further enhances ground performance.
• Adequate — If the preceding systems are impossible to implement, contact a local Hewlett-Packard site
preparation specialist. Arrangements can be made to provide custom lengths of ground braid to
interconnect system cabinets. However, connecting system cabinets with custom lengths of braided
ground straps causes higher ground impedance than the techniques used in the excellent and good
ground grid systems, and the resulting ground system will not perform as well.