HP Modular Cooling System manual System grounding

Note:

The power requirements discussed in this guide are for the fans and electronics for the MCS 5042 only. Data processing components such as servers, storage, and network devices must be considered separately, based on individual power requirements.

System grounding

HP server systems require two methods of grounding: power distribution grounding for safety, and high-frequency signal grounding for equipment performance. Power distribution grounding involves the main building electrical service entrance, electrical conduit, facility power panels, and equipment cabinets (including the MCS 5042), which must be grounded, using green/yellow insulated wire conductors according to the applicable electrical codes. High-frequency grounding consists of using ground return conductors for intra-cabinet and inter-cabinet signal interconnects, as well as chassis and cabinet grounding.

For MCS 5042 and server systems installed on a raised floor, the floor assembly must be electrically grounded to form a complete ground grid. An optimum raised-floor grounding solution is shown in Figure 15.

Each floor panel must have at least one supporting pedestal grounded to the power panel and another pedestal grounded to the MCS 5042. The central ground connection of the MCS 5042 is located in the bottom rear of the IT rack. This broadband solution provides grounding for maximum safety and performance.

Figure 15: Central ground stud location inside the IT rack

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