Connecting Ac Power To Multiple-Server Configurations - HP P4535A - Web Cache Server Appliance Getting Started Manual

Chapter 1

Connecting AC Power to Multiple-Server Configurations

The HP Cache Server Appliance temporarily draws a large "inrush current" when
first connected to an AC power source. This also occurs when the appliance is in a
standby mode (power is turned off, but the power cord is plugged into AC power).
The inrush current is much greater than the appliance's normal operating current.
The AC power source can handle the inrush current under normal circumstances.
However, the following factors must be considered when installing several HP
Cache Server Appliances on one circuit:
• If there is a power failure and power is then restored, all the servers
immediately begin to draw inrush current at the same time.
• If the circuit breakers on the incoming power line have insufficient
capability, the breaker may trip and thus prevent the servers from powering
up.
When preparing your site for installation, allow for the additional inrush current.
Refer to Table A-1, "System Power Specifications," in Appendix A.
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Controls, Ports and Indicators