HP 9000 rp5400 Servers - Manual (Page 143)

C General Site Preparation Guidelines
The following information provides general principles and practices to consider before the
installation or operation of an hp server.
Electrical Factors
Proper design and installation of a power distribution system for an hp server requires specialized
skills. Those responsible for this task must have a thorough knowledge and understanding of
appropriate electrical codes and the limitations of the power systems for computer and data
processing equipment.
In general, a well-designed power distribution system exceeds the requirements of most electrical
codes. A good design, when coupled with proper installation practices, produces the most
trouble-free operation.
A detailed discussion of power distribution system design and installation is beyond the scope
of this information. However, electrical factors relating to power distribution system design and
installation must be considered during the site preparation process.
The electrical factors discussed in this section are:
•
Computer room safety
• Power Consumption
• Electrical load requirements (circuit breaker sizing)
• Power quality
• Distribution hardware
• System installation guidelines
Computer Room Safety
Inside the computer room, fire protection and adequate lighting (for equipment servicing) are
important safety considerations. Federal and local safety codes govern computer installations.
Fire Protection
The National Fire Protection Association's Standard for the Protection of Electronic Computer
Data Processing Equipment, NFPA 75, contains information on safety monitoring equipment
for computer rooms.
Most computer room installations are equipped with the following fire protection devices:
•
Smoke detectors
• Fire and temperature alarms
• Fire extinguishing system
Additional safety devices are:
•
Circuit breakers
• An emergency power cutoff switch
• Devices specific to the geographic location i.e., earthquake protection
Lighting Requirements for Equipment Servicing
Adequate lighting and utility outlets in a computer room reduce the possibility of accidents
during equipment servicing. Safer servicing is also more efficient and, therefore, less costly.
For example, adequate lighting reduces the chances of connector damage when cables are installed
or removed.
The minimum recommended illumination level is 70 foot-candles (756 lumens per square meter)
when the light level is measured at 30 inches (76.2 cm) above the floor.
Electrical Factors 143