User guide

Specifications 114
•
Switching or disconnecting devices should not be in the earthed circuit conductor between the
DC source and the point of connection of the earthing electrode conductor.
CAUTION: To reduce the risk of electric shock or energy hazards:
• This equipment must be installed by trained service personnel, as defined by the NEC and IEC
60950-1, Second Edition, the standard for Safety of Information Technology Equipment.
• Connect the equipment to a reliably grounded safety extra low voltage (SELV) source. An SELV
source is a secondary circuit that is designed so normal and single fault conditions do not
cause the voltages to exceed a safe level (60 V direct current).
• The branch circuit overcurrent protection must be rated 20A.
Hot-plug power supply calculations
For hot-plug power supply specifications and calculators to determine electrical and heat loading for the
server, refer to the HP Enterprise Configurator website (http://h30099.www3.hp.com/configurator/).