HP Modular Cooling System Site Preparation Guide

Electrical Considerations

The HP MCS provides two C20-type AC input connections and ships with two sets of power cords

for connecting to redundant AC power busses, if available. Only one power cord is necessary for

operation. The second cord can be connected to a redundant AC power bus to improve system

availability by protecting against power source failures or accidentally tripped circuit breakers.

NOTE;

Electrical practices and suggestions in this guide are based on North

American practices. For regions and areas outside North America, local

electrical codes will take precedence over North American electrical

codes. An example would be the recommendation that the protective

ground conductor be green with yellow stripes. This requirement is a

North American directive and does not override the local code

requirements for a region or areas outside North America

NOTE:

The power requirements discussed in this guide for the fans and

electronics for the HP MCS only. Data processing components such as

servers, storage and network devices must be considered separately

based on their 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 HP MCS and server cabinets), which should 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- and inter-cabinet signal

interconnects as well as chassis and cabinet grounding.

For HP MCS and server systems installed on a raised floor, the floor assembly should be electrically

grounded to form a complete ground grid. An optimum raised-floor grounding solution is shown in

Figure 9.

HP MCS Site Preparation Guide