HP LH4r HP Netserver LT 6000r Rack Cabling Guide - Page 9

Rack Assembly and Cabling Cautions and, Warnings

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Chapter 1 Preparation for Cabling the HP NetServer LT 6000r Site Preparation -- Circuit Breakers When you connect the HP NetServer LT 6000r to an AC power source, the server temporarily draws a large "inrush current." This occurs even when the system is in standby mode. Inrush current is much greater than the server's normal operating needs. Generally, your external AC power source can handle the inrush current. However, if you install several HP NetServers on one circuit, precautions are necessary. For instance, 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, they may trip and thus prevent the servers from powering up. When preparing your site for installation, allow for the additional inrush current. Consider the following before installing the server in your environment: • In North America, a 20-amp-minimum circuit is to be used with one NEMA AB1 class 14B breaker for each 16-amp Power Distribution Unit that is to be connected to an HP NetServer LT 6000r. • In Europe: ◊ For a single LT 6000r unit in a rack, use a 16-amp-minimum circuit with one IEC MCB C-type breaker for each 16-amp Power Distribution Unit. ◊ For multiple LT 6000r units in a rack, use a 16-amp-minimum circuit with one IEC MCB D-type breaker for each 16-amp Power Distribution Unit. NOTE Some local codes do not allow a 16-amp device to be connected to a 16-amp service. Consult a qualified electrician or local regulatory authority before beginning electrical site preparation. Rack Assembly and Cabling Cautions and Warnings Unterminated Power Cords Require Licensed Electrician In some cases in the 230/240V environment, the Uninterruptible Power Supply (UPS) is shipped with a power cord that is unterminated. The reason is that the current demand of a fully loaded rack may exceed the demand for the normal circuit in some countries. Therefore, HP recommends that you have a qualified electrician or electrical engineer analyze the current demand for each branch circuit used by rack mounted equipment. Proper wiring and cord termination are part of the same process. 5

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Chapter 1
Preparation for Cabling the HP NetServer LT 6000r
5
Site Preparation -- Circuit Breakers
When you connect the HP NetServer LT 6000r to an AC power source, the server
temporarily draws a large “inrush current.” This occurs even when the system is in
standby mode. Inrush current is much greater than the server’s normal operating
needs. Generally, your external AC power source can handle the inrush current.
However, if you install several HP NetServers on one circuit, precautions are
necessary. For instance, 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, they may
trip and thus prevent the servers from powering up.
When preparing your site for installation, allow for the additional inrush current.
Consider the following before installing the server in your environment:
•
In North America, a 20-amp-minimum circuit is to be used with one
NEMA AB1 class 14B breaker for each 16-amp Power Distribution Unit
that is to be connected to an HP NetServer LT 6000r.
•
In Europe:
◊
For a single LT 6000r unit in a rack, use a 16-amp-minimum circuit
with one IEC MCB C-type breaker for each 16-amp Power Distribution
Unit.
◊
For multiple LT 6000r units in a rack, use a 16-amp-minimum circuit
with one IEC MCB D-type breaker for each 16-amp Power
Distribution Unit.
NOTE
Some local codes do not allow a 16-amp device to be
connected to a 16-amp service. Consult a qualified electrician
or local regulatory authority before beginning electrical site
preparation.
Rack Assembly and Cabling Cautions and
Warnings
Unterminated Power Cords Require Licensed Electrician
In some cases in the 230/240V environment, the Uninterruptible Power Supply
(UPS) is shipped with a power cord that is unterminated. The reason is that the
current demand of a fully loaded rack may exceed the demand for the normal
circuit in some countries. Therefore, HP recommends that you have a qualified
electrician or electrical engineer analyze the current demand for each branch
circuit used by rack mounted equipment. Proper wiring and cord termination are
part of the same process.