Table of Contents
1GENERAL
1.1Scope
1.2References
1.3Definitions
2ENCLOSURETYPES,FEATURES,ANDAPPLICATIONS
2.1General
2.2SpecificTypes
3CONSTRUCTION
3.1General
3.2UnitsofMeasurement
3.3Materials-General
3.4Materials-Polymeric
3.5CorrosionProtection-General
3.5.1IndoorCorrosionProtection
3.5.2OutdoorCorrosionProtection
3.5.3AnnealedCoating
3.5.4BendsandFormsonZincCoatings
3.5.5HotDippedGalvanizedDamage
3.5.6CastIron
3.5.7CorrosionProtectionforType3X,3RX,3SX,4X
and6PEnclosures
3.6Openings
3.6.1EquipmentOpenings
3.6.2Ventilation
3.6.3DrainageOpenings
3.7Mounting
3.8ConduitConnection
3.9HubsandFittings
3.10Knockouts
3.11ExternalOperatingMechanisms
3.12AccesstoInterior
3.13ClosingHardware
3.14Gaskets
3.15ObservationWindows
4MARKING
4.1TypeDesignations
4.2SupplementalMarkings
4.3LocationofMarkings
4.4EnclosureOrientation
4.5ConduitHubsandClosurePlates
4.6EquipmentOpenings
4.7DrainageOpenings
5DESIGNTESTS
5.1General
5.2TestForProtectionagainstAccesstoHazardousParts
5.2.1Non-ventilatedEnclosuresTestMethod
5.2.2VentilatedEnclosuresTestMethod
5.2.3Evaluation
5.3TestforProtectionagainstIngressofWater(Dripping
andLightSplashing)
5.3.1MethodA
5.3.2MethodB
5.3.3Evaluation
5.4TestforProtectionagainstIngressofWater(Rain)
5.4.1Method
5.4.2Evaluation
5.5TestforProtectionagainstIngressofSolidForeign
Objects(SettlingAirborneDust,Lint,Fibers,And
Flyings)
5.5.1OutdoorDustTest
5.5.2IndoorDustTests
5.6ExternalIcingTest
5.6.1TestMethod
5.6.2Evaluation
5.7TestforProtectionagainstIngressofWater(Hosedown)
5.7.1TestMethod
5.7.2Evaluation
5.8IndoorCorrosionProtection(Rust-ResistanceTest
(24-HourSaltSprayTest))
5.8.1TestEquipment
5.8.2SaltSolution
5.8.3AirSupply
5.8.4Temperature
5.8.5TestProcedure
5.8.6Evaluation
5.9OutdoorCorrosionProtection
5.9.1600-HourSaltSprayTest
5.9.2Evaluation
5.9.31200-HourMoistCarbonDioxide-Sulfur
Dioxide-AirTest
5.10CorrosionProtection-Type3X,3RX,3SX,4XOr6P
Enclosures
5.10.1Evaluation
5.11TestforProtectionagainstIngressofWater(Temporary
Submersion)
5.11.1TestMethod
5.11.2Evaluation
5.12TestforProtectionagainstIngressofWater
(ProlongedSubmersion)
5.12.1AlternateTests
5.13OilExclusionTest
5.13.1TestMethod
5.13.2Evaluation
5.14GasketTests
5.14.1AgingTest
5.14.2Evaluation
5.14.3Oilimmersiontest
AnnexA-ComparisonBetweenNEMAEnclosureTypeNumbersand
ANSI/IECEnclosureClassificationDesignations
A.1GENERAL
AnnexB-Descriptions,Applications,Features,andTestCriteria
ofEnclosuresforHazardous(Classified)Locations
B.1GENERAL
B.2SPECIFICTYPES
B.2.1EnclosureFeatures
B.2.2EnclosureTestCriteria Abstract
Consolidates the descriptions and applications, features and test criteria, and design tests of all NEMA-type enclosures (except for rotary-type apparatus) into a single document.
