Dell PowerEdge 2650 User Manual

Dell™ Systems

Cabling Instructions for the –48 VDC

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Notes, Notices, and Cautions

NOTE: A NOTE indicates important information that helps you make better use of your computer.

NOTICE: A NOTICE indicates either potential damage to hardware or loss of data and tells you

how to avoid the problem.

CAUTION: A CAUTION indicates a potential for property damage, personal injury,

or death.

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Reproduction in any manner whatsoever without the written permission of Dell Computer Corporation is strictly forbidden. Trademarks used in this text: Dell and the DELL logo are trademarks of Dell Computer Corporati on. Other trademarks an d tra de names may be used in this document to refer to eith er the entities claiming t he marks and

names or their products. Dell Computer Corporation disclaims any proprietary interest in t rademarks and trade names other than its own.

March 2002 P/N 0R216 Rev. A00

This document describes the requirements and wiring instructions for a –48 VDC power cable and safety ground wire for systems equipped with a –48 VDC power supply.

CAUTION: A qualified electrician must perform all connections to DC power and

safety grounds. The system must be safety grounded at the cabinet frame. All electrical wiring must comply with applicable local or national codes and practices.

CAUTION: The system chassis must be positively grounded to the rack cabinet

frame. Do not attempt to connect power to the system until grounding cables are connected.

CAUTION: An energy hazard will exist if the safety ground cable is omitted or

disconnected.

Precaution Statements

This product is intended for restricted access locations (dedicated equipment rooms, equipment closet, or the like) in accordance with Articles 110-5, 110-6, 110-11, 110-14, and 110-17 of the National Electrical Code, American National Standards Institute (ANSI)/National Fire Protection Association (NFPA) 70.

Wire the unit with copper only, unless otherwise specified, 16 American Wire Gauge (AWG) wire, and protect it with a 7.2-ampere (A) minimum to a 20-A maximum protective device or a 25-A maximum protective device when used with 90ºC wire.

Connect the equipment to a –48 VDC supply source that is electrically isolated from the AC source. Ensure that the –48 VDC source is efficiently secured to earth (ground).

CAUTION: When stranded wiring is required, use approved wiring termination,

such as closed-loop or spade-type with upturned lugs. These terminations should be the appropriate size for the wires and must be double crimped, one on the conductor and one on the insulation.

CAUTION: When installing the unit, the ground connection must always be made

first and disconnected last to prevent an energy hazard.

CAUTION: Never defeat the ground conductor or operate the equipment in the

absence of a suitably installed ground conductor. Contact the appropriate electrical inspection authority or an electrician if you are uncertain that suitable grounding is available.

Cabling Instructions for the –48 VDC 1-1

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