Table of Contents
Foreword
Section1GENERAL
1.1ReferencedStandards
1.2Scope
1.3NormativeStandards
1.4GeneralRequirements
Section2DEFINITIONS
Section3CLASSIFICATION
3.1StandardEnclosureTypes
3.2MultipleTypeDesignations
Section4CHARACTERISTICSANDRATINGS
Section5PRODUCTMARKING,INSTALLATION,ANDMAINTENANCE
INFORMATION
5.1Marking
5.2EnclosureGrounding
5.3TaperedPipeThreads
5.4Maintenance
Section6SERVICEANDSTORAGECONDITIONS
Section7CONSTRUCTION
7.1StrengthofEnclosures
7.1.1SheetMetalEnclosures
7.1.2CastMetalEnclosures
7.1.3SecuringMeans
7.2VentilatingOpenings
7.2.1General
7.2.2PerforatedorExpandedSheetMetal
7.2.3ScreenEnclosures
7.2.4MinimumScreenWireSize
7.3WireEntrances
7.3.1Knockouts
7.3.2KnockoutDiametersandConduitBushing
Dimensions
7.3.3ThreadedConduitHubs
7.3.4ThreadedHolesforRigidConduit
7.4ElectricalSpacings
7.5Wire-BendingSpace
7.6ProvisionsforGrounding
7.7Legends
Section8PERFORMANCEREQUIREMENTSANDTESTS
8.1General
8.2NonmetallicEnclosures
8.3Type5andType12EnclosureswithVentilated
Compartment
Section9APPLICATION Abstract
Covers the enclosure requirements of all industrial control devices functioning on commercial voltages of up to 750 volts DC, or up to 7200 volts AC. Also includes information concerning ratings, construction, testing, performance and manufacture.
