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NEMA PB 2.1:2007

NEMA PB 2.1:2007 General Instructions For Proper Handling, Installation, Operation, And Maintenance Of Deadfront Distribution Switchboards Rated 600 Volts Or Less Covers floor-mounted deadfront switchboards which consist of an enclosure, molded-case and low-voltage power circuit breakers, fusible or non-fusible switches, instruments, and metering, monitoring, o

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Table of Contents

Foreword
Section1-GENERAL
1.1Scope
1.2References
1.3General
1.3.1SuccessfulOperation
1.3.2QualifiedPersonnel
1.3.3DefinitionofQualifiedPersonnel
Section2-HANDLING
2.1Manufacturer'sHandlingInstructions
2.2CaretoAvoidDamage
2.3UprightPosition
2.4EquipmentCapacity
2.5ConcealedDamage
2.6StoragePriortoInstallation
2.7ShippingSkid
2.8RodorPipeRollers
2.9ForkliftTruck
2.10OverheadHoisting
2.10.1RigidSpreadersorSpannerBars
2.10.2RiggingLengths
2.10.3AngleBetweenLiftingCablesandVertical
2.10.4SlingsWithSafetyHooksorShackles
2.10.5RemovalofSwitchboardTopCovers
Section3-STORAGE
3.1Clean,DrySpaceHavingUniformTemperature
3.2ProtectionfromWeatherandDirt
3.3OutdoorSwitchboardsareNotWeatherResistantUntil
Installed
3.4Un-EnergizedOutdoorSwitchboardShouldBeKeptDry
Internally
Section4-INSTALLATIONOFSWITCHBOARDORENCLOSURE
4.1Manufacturer'sInstallationInstructions
4.2Location
4.2.1ClearancefromWalls
4.2.2WorkingClearances
4.3ChannelSills
4.4ConduitandOtherRaceways
4.5LevelingandSecuring
4.6SpliceBus
4.7GroundingandBonding
4.7.1GroundedSystems
4.7.2UngroundedSystems-ServiceEquipmentorSeparately
DerivedSystemMain
4.7.3GroundedorUngroundedSystems
4.8UnusedOpenings
4.9DampIndoorLocations
4.10UnusualServiceConditions

Abstract

Covers floor-mounted deadfront switchboards which consist of an enclosure, molded-case and low-voltage power circuit breakers, fusible or non-fusible switches, instruments, and metering, monitoring, or control equipment, with associated interconnections and supporting structures.

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