HP Integrity rx8620 Site Preparation Guide, Fourth Edition - HP Integrity rx86 - Page 21

Power Consumption, Electrical Load Requirements Circuit Breaker Sizing, Power Quality

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General Site Preparation Guidelines Electrical Factors • Circuit breakers • An emergency power cutoff switch • Devices specific to the geographic location (such as 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 in (76.2 cm) above the floor. Working Space for Server Access The recommended working space for performing maintenance on the server is three feet. The work space shall permit at least a 90-degree opening of equipment doors or hinged panels. When planning for the working-space area, consider whether access to the server will be at the front, the side, or the rear of the server. Power Consumption When determining power requirements, you must consider any peripheral equipment that will be installed during initial installation or as a later update. Refer to the applicable documentation for such devices to determine the power required to support these devices. Electrical Load Requirements (Circuit Breaker Sizing) NOTE LAHJ and should make the final decision regarding adherence to country-specific electrical codes and guidelines. It is good practice to derate power distribution systems for one or both of the following reasons: • To avoid nuisance tripping from load shifts or power transients, circuit protection devices should never be run above 80% of their root-mean-square (RMS) current ratings. • Safety agencies derate most power connectors to 80% of their RMS current ratings. Power Quality The server is designed to operate over a wide range of voltages and frequencies. The server is tested and shown to comply with EMC Specification EN50082. However, damage can occur if these ranges are exceeded. Severe electrical disturbances can exceed the design specifications of the equipment. Chapter 2 15

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Chapter 2
General Site Preparation Guidelines
Electrical Factors
15
•
Circuit breakers
•
An emergency power cutoff switch
•
Devices specific to the geographic location (such as 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 in (76.2 cm) above the floor.
Working Space for Server Access
The recommended working space for performing maintenance on the server is three feet. The work space
shall permit at least a 90-degree opening of equipment doors or hinged panels. When planning for the
working-space area, consider whether access to the server will be at the front, the side, or the rear of the
server.
Power Consumption
When determining power requirements, you must consider any peripheral equipment that will be installed
during initial installation or as a later update. Refer to the applicable documentation for such devices to
determine the power required to support these devices.
Electrical Load Requirements (Circuit Breaker Sizing)
NOTE
LAHJ and should make the final decision regarding adherence to country-specific electrical
codes and guidelines.
It is good practice to derate power distribution systems for one or both of the following reasons:
•
To avoid nuisance tripping from load shifts or power transients, circuit protection devices should never be
run above 80% of their root-mean-square (RMS) current ratings.
•
Safety agencies derate most power connectors to 80% of their RMS current ratings.
Power Quality
The server is designed to operate over a wide range of voltages and frequencies. The server is tested and
shown to comply with EMC Specification EN50082. However, damage can occur if these ranges are exceeded.
Severe electrical disturbances can exceed the design specifications of the equipment.