Table of Contents
1GENERAL
1.1Scope
1.2ApplicationBasis
1.3NormativeReferences
2DEFINITIONS
3CLASSIFICATIONS
4CHARACTERISTICSANDRATINGS
4.1CircuitBreakerRatings
4.2Molded-CaseSwitchRatings
4.3Motor-CircuitSwitchRatings
4.3.1HorsepowerRatings
4.3.2Short-CircuitWithstandRating
4.4RatedInsulationVoltage
5PRODUCTMARKING,INSTALLATION,ANDMAINTENANCEINFORMATION
5.1Marking
5.1.1ShownonDeviceNameplate,orLabelAttachedto
theMotor-CircuitSwitch
5.1.2ShownonNameplateof,LabelAttachedto,or
InstructionMaterialPackagedwith,the
Motor-CircuitSwitch
5.2Exception
5.3OtherDisconnectDevicesforMotorService
5.4MarkingLimitations
5.5OperatingHandlesSoldSeparately
6SERVICEANDSTORAGECONDITIONS
7CONSTRUCTION
7.1ClearancesandCreepageDistances
7.2MinimumAirGapinOpenPosition
7.3MechanicalDesignofOperatingHandleandMechanism
7.4ExternalOperatingHandlesforDisconnectDevices
7.5StatusIndication
7.6OperatingMechanismforDisconnectDevices
7.7MechanicalInterlockwithDoor(S)
7.8PadlockingProvisions
7.9AdditionalConstructionRequirementsforDisconnect
Devices
7.10FuseMounting
8PERFORMANCEANDTEST
8.1Circuit-BreakerandMolded-CaseSwitchTypeTests
8.2Motor-CircuitSwitchTypeTests
8.3VerificationoftheStrengthofExternalOperatingHandle,
Mechanism,andPositionIndicatingDevice
9APPLICATION
9.1ApplicationofCircuitBreakers
9.2ProtectionofNonfusedMotor-CircuitSwitches
9.3SafetyProcedureforVerifyingDeenergizedCondition
9.3.1VerifythatEquipmentCannotbeRestarted
9.3.2VerifythatCircuitandEquipmentareDeenergized Abstract
Covers disconnect devices for use in industrial control equipment, including AC motor-circuit switches rated 600 volts and separable or accessory operating mechanisms and handles for the external operation of motor-circuit switches, circuit breakers, and molded-case switches. The devices covered by this standard are for application in combination starters, motor control centers, and industrial control panels.
