42U User Manual Brandname: NEC Category: Racks & Stands Total Pages: 72 Table of contents UsingThisGuide7TextConventions8SafetyNotices9CareandHandling10Introduction11Introduction1242USystemRack13Multi-BaySystemRack15PlanningYourSite17EquipmentLocation18SystemRackPlacement23AirConditioning25ElectricalFacilities26GroundingRequirements27PlanningYourSystemRack29CablingConstraints30VerticalSpacing31ConfigurationGuidelines34On-BatteryRunTime36