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ANSI/NEMA EN 10250-2024 Enclosures for Electrical Equipment (1,000 Volts Maximum), 2024
- 1.1 Scope
- 1.2 References
- 1.3 Definitions
- Section 2 Enclosure Types, Features, and Applications [Go to Page]
- 2.1 General
- 2.2 Explanation of the Enclosure Type Nomenclature
- 2.3 Specific Type Ratings
- 2.4 Ancillary Ratings
- Section 3 Construction [Go to Page]
- 3.1 General
- 3.2 Units of Measurement
- 3.3 Materials—General
- 3.4 Materials—Polymeric
- 3.5 Corrosion Protection—General [Go to Page]
- 3.5.1 Indoor Corrosion Protection
- 3.5.2 Outdoor Corrosion Protection [Go to Page]
- 3.5.2.1 Galvanized G90
- 3.5.2.2 Zinc Coating
- 3.5.2.3 Zinc Coating with Paint [Go to Page]
- 3.5.2.3.1 Galvanized G60
- 3.5.2.4 Paint
- 3.5.3 Annealed Coating
- 3.5.4 Bends and Forms on Zinc Coatings
- 3.5.5 Hot-Dipped Galvanized Damage [Go to Page]
- 3.5.5.1 Uncoated Cross-Sectional Surfaces
- 3.5.5.2 Base Metal
- 3.5.5.3 Sheet Steel
- 3.5.6 Cast Iron
- 3.5.7 Corrosion Protection for Types 3X, 3RX, 3SX, 4X, 6P, 12-XH, 12K-XH, and 13-XH Enclosures
- 3.6 Openings [Go to Page]
- 3.6.1 Equipment Openings
- 3.6.2 Ventilation
- 3.6.3 Drainage Openings
- 3.7 Mounting
- 3.8 Conduit Connection
- 3.9 Hubs and Fittings
- 3.10 Knockouts
- 3.11 External Operating Mechanisms
- 3.12 Access to Interior
- 3.13 Closing Hardware
- 3.14 Gaskets
- 3.15 Observation Windows
- 3.16 Edge Sharpness on Enclosures
- Section 4 Marking [Go to Page]
- 4.1 Type Designations
- 4.2 Supplemental Markings
- 4.3 Location of Markings
- 4.4 Enclosure Orientation
- 4.5 Conduit Hubs and Closure Plates
- 4.6 Equipment Openings
- 4.7 Drainage Openings
- Section 5 Design Tests [Go to Page]
- 5.1 General [Go to Page]
- 5.1.1 Protection Against Access to Hazardous Parts and Against Solid Foreign Objects
- 5.1.2 Protection Against Access to Hazardous Parts
- 5.1.3 Protection Against Solid Foreign Objects
- 5.1.4 Degrees of Protection Against Ingress of Water
- 5.1.5 Additional Protection Offered by Enclosure Types
- 5.1.6 Ancillary Ratings—Degree of Protection
- 5.2 Test for Protection Against Access to Hazardous Parts [Go to Page]
- 5.2.1 Nonventilated Enclosures Test Method
- 5.2.2 Ventilated Enclosures Test Method
- 5.2.3 Evaluation
- 5.3 Test for Protection Against Ingress of Water (Dripping and Light Splashing) [Go to Page]
- 5.3.1 Method A
- 5.3.2 Method B
- 5.3.3 Evaluation [Go to Page]
- 5.3.3.1 Evaluation Considering Live Parts
- 5.4 Test for Protection Against Ingress of Water (Rain) [Go to Page]
- 5.4.1 Method
- 5.4.2 Evaluation [Go to Page]
- 5.4.2.1 Evaluation Considering Live Parts
- 5.5 Tests for Protection Against Ingress of Solid Foreign Objects (Windblown, Circulating, and Settling Dust, Lint, Fibers, and Flyings) [Go to Page]
- 5.5.1 Outdoor (Windblown) Dust Test [Go to Page]
- 5.5.1.1 Dust Blast Method
- 5.5.1.2 Evaluation—Dust Blast Method
- 5.5.1.3 Hose Method
- 5.5.1.4 Evaluation—Hose Method
- 5.5.2 Indoor (Circulating and Settling) Dust Tests [Go to Page]
- 5.5.2.1 Circulating Dust Test [Go to Page]
- 5.5.2.1.1 Circulating Dust Methods
- Circulating Dust Method A
- Circulating Dust Method B
- 5.5.2.1.1.1 Evaluation—Circulating Dust Method
- 5.5.2.1.2 Atomized Water Method (Method A)
- 5.5.2.1.3 Evaluation—Atomized Water Method (Method A)
- 5.5.2.2 Settling Dust Test [Go to Page]
- 5.5.2.2.1 Settling Dust Method
- 5.5.2.2.2 Evaluation—Settling Dust Method
- 5.5.2.2.3 Atomized Water Method (Method B)
- 5.5.2.2.4 Evaluation—Atomized Water Test (Method B)
- 5.6 External Icing Test [Go to Page]
- 5.6.1 Test Method
- 5.6.2 Evaluation
- 5.7 Test for Protection Against Ingress of Water (Hosedown) [Go to Page]
- 5.7.1 Test Method
- 5.7.2 Evaluation
- 5.8 Indoor Corrosion Protection (Rust-Resistance Test (24-Hour Salt Spray Test)) [Go to Page]
- 5.8.1 Test Equipment
- 5.8.2 Salt Solution
- 5.8.3 Air Supply
- 5.8.4 Temperature
- 5.8.5 Test Procedure
- 5.8.6 Evaluation
- 5.9 Outdoor Corrosion Protection [Go to Page]
- 5.9.1 600-Hour Salt Spray Test
- 5.9.2 Evaluation
- 5.9.3 1,200-Hour Moist Carbon Dioxide—Sulfur Dioxide—Air Test
- 5.10 Corrosion Protection—Type 3X, 3RX, 3SX, 4X, 6P, 12-XH, 12K-XH, or 13-XH Enclosures [Go to Page]
- 5.10.1 Evaluation
- 5.11 Test for Protection Against Ingress of Water (Temporary Submersion) [Go to Page]
- 5.11.1 Test Method
- 5.11.2 Evaluation
- 5.12 Test for Protection Against Ingress of Water (Prolonged Submersion) [Go to Page]
- 5.12.1 Alternate Tests [Go to Page]
- 5.12.1.1 Internal Pressurization Test
- 5.12.1.2 Evaluation—Internal Pressurization
- 5.12.1.3 External Pressurization Test
- 5.12.1.4 Evaluation—External Pressurization
- 5.13 Oil Exclusion Test [Go to Page]
- 5.13.1 Test Method
- 5.13.2 Evaluation
- 5.14 Gasket Material Tests [Go to Page]
- 5.14.1 Evaluation
- 5.14.1.1 Alternate Evaluation (Foam-in-Place Gaskets, O-Rings, Plastic Gaskets)
- 5.14.2 Aging Test
- 5.14.3 Compression Test
- 5.14.4 Oil Immersion Test
- 5.15 High-Pressure Power Wash Test [Go to Page]
- 5.15.1 Test Method
- Section 6 Field Modifications [Go to Page]
- 6.1 Painting of Enclosure Exteriors (Excluding Types 7 and 9)
- Annex A (Informative) Comparison Between ANSI/NEMA EN 10250 Enclosure Type Numbers and ANSI/IEC 60529 Enclosure Classification Designations
- A.1 General [Go to Page]
