Site Preparation Guide, Fourth Editon - HP Integrity rx7620 Server

Appendix B
General Site Preparation Guidelines
Electrical Factors
35
• Good—Use the raised floor structure as a signal reference grid. In this case, the floor must be designed as
a ground grid with bolted stringers and corrosion resistive plating (to provide low resistance and
attachment points for connection to service entrance ground and server equipment). The use of conductive
floor tiles with this style of grid further enhances ground performance. The structure needs to be
mechanically bonded to a known good ground point.
Figure B-1 Raised Floor Ground System
Equipment Grounding Implementation Details
Connect all HP equipment cabinets to the site ground grid as follows:
1. Attach one end of each ground strap to the applicable cabinet ground lug.
2. Attach the other end to the nearest pedestal base (raised floor) or cable trough ground point (nonraised
floor).
3. Check that the braid contact on each end of the ground straps consists of a terminal and connection
hardware (a 0.25 in. (6.0 mm) bolt, nuts, and washers).
4. Check that the braid contact connection points are free of paint or other insulating material and are
treated with a contact enhancement compound (similar to Burndy Penetrox).
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