HP Integrity rx7620 Site Preparation Guide, Fourth Editon - HP Integrity rx762 - Page 49

General Site Preparation Guidelines Electrical Factors • 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 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 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). Appendix B 35