HP NetServer LH 3000 Guide d'installation télécharger pdf (Page 9)

Chapter 1 Preparation for Cabling the HP NetServer LH 3000r

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 LH 3000r.

• In Europe:

◊ For a single LH 3000r 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 LH 3000r 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.

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HP NetServer LH 3000 Guide d'installation Page 9