Dell External M1000e t Owner's Manual

Also see for PowerEdge M1000e: Manual Command reference guide Owner's manual Update Getting started guide

Contents

Dell External M1000e t Owner's Manual Manual pdf 74 page image

DC Power Supply ModulesWiring Instructions For A DC Power SupplyThis document describes the requirements and wiring instructions for a –48 V DC power wire and safety ground wire forsystems equipped with a –48 V DC supply.WARNING: For equipment using –(48–60) V DC power supplies, a qualified electrician must perform all connectionsto DC power and to safety grounds. Do not attempt connecting to DC power or installing grounds yourself. Allelectrical wiring must comply with applicable local or national codes and practices. Damage due to servicing thatis not authorized by Dell is not covered by your warranty. Read and follow all safety instructions that came with theproduct.WARNING: An energy hazard will exist if the safety ground cable is omitted or disconnected.WARNING: The system chassis must be positively grounded to the rack cabinet frame. Do not attempt to connectpower to the system until grounding cables are connected.CAUTION: A qualified electrician must perform all connections to DC power and safety grounds. The system mustbe safety grounded at the cabinet frame. All electrical wiring must comply with applicable local or national codesand practices.CAUTION: This equipment is designed to permit the connection of the earthed conductor of the DC supply circuit tothe earthing conductor on the equipment. See the installation instructions. If this connection is made, all of thefollowing conditions must be met.• This equipment must be connected directly to the DC supply system earthing electrode conductor or to abonding jumper from an earthing terminal bar or bus to which the DC supply system earthing electrodeconductor is connected.• This equipment must be located in the same immediate area (such as, adjacent cabinets) as any otherequipment that has a connection between the earthed conductor of the same DC supply circuit and the earthingconductor, and also the point of earthing of the DC system. The DC system must not be earthed elsewhere.• The DC supply source must be located within the same premises as this equipment.• The earthed circuit conductor between the DC power source and the earthing electrode conductor must not beconnected to switching or disconnecting devices.Precaution StatementsThis product is intended for restricted access locations (dedicated equipment rooms, equipment closet, or the like) inaccordance with the National Electrical Code, American National Standards Institute (ANSI)/National Fire ProtectionAssociation (NFPA) 70.CAUTION: Wire the unit with copper only. Unless otherwise specified, use only 4 American Wire Gauge (AWG)wire rated minimum 90 ºC (194 ºF) for source and return. Protect the –(48–60) V DC (1 wire) with a branch circuitovercurrent protection rated 100 A for DC with a high interrupt current rating.Connect the equipment to a –48 V DC supply source that is electrically isolated from the AC source (reliably grounded 48V DC SELV source). Ensure that the –48 V DC source is secured to earth (ground).NOTE: A readily accessible disconnect device that is suitably approved and rated must be incorporated in the fieldwiring.CAUTION: When stranded wiring is required, use approved wiring termination, such as closed-loop or spade-typewith upturned lugs. These terminations are the appropriate size for the wires and must be double crimped, one onthe conductor and one on the insulation.74