Electrical enclosure reference
NEMA Enclosure Rating Chart
Screen NEMA enclosure Types by installation environment, compare protection characteristics, and verify the differences that matter before specifying an enclosure.
- Basis
- ANSI/NEMA EN 10250-2024
- Scope
- ≤ 1000 V equipment
- Types
- 18 main Type designations
Environment-based screening
Find a NEMA Enclosure Type for Your Environment
Choose the exposure conditions that matter. The finder returns candidate Types to investigate; it does not certify a design.
Without JavaScript, use the chart immediately below. For an ordinary indoor dry location, Type 1 is the basic reference point; outdoor, dust, washdown, corrosion, icing, submersion, or classified-location conditions change the screening result.
Selection boundary
This finder is a screening aid. Verify the current standard, complete enclosure construction, product listing or certification, manufacturer instructions, classified-location requirements, and project specifications before selection.
Protection characteristics
NEMA Enclosure Rating Chart
Compare the Type designation, location scope, major environmental characteristics, and the limitation most likely to prevent a bad substitution.
Search any Type or exposure term. Select up to three rows to build a differences-focused comparison. On mobile, scroll inside the table—not the page—to see additional columns.
No NEMA enclosure Types match the current chart filters. Clear the search or location filter, or use the environment finder above.
Scroll horizontally to view additional columns and vertically to view additional rows. Column headers remain visible while scrolling.
| Compare | Protection characteristics | Plain-language scope | Key limitation | Copy | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Dust / solids | Water exposure | External icing | Submersion | |||||||
| NEMA Type 1 | Indoor | Falling dirt | Dry / ordinary indoor | No | — | None | Basic indoor enclosure protection against contact with hazardous parts and falling dirt. | Not an outdoor, washdown, dust-tight, or submersion classification. | ||
| NEMA Type 2 | Indoor | Falling dirt | Dripping water | No | — | None | Indoor protection that adds a degree of protection against dripping water. | Not intended as an outdoor rain, hose-down, or submersion classification. | ||
| NEMA Type 3 | Indoor / outdoor | Falling dirt + windblown dust | Rain, sleet, snow | No | Undamaged by external ice | None | Indoor/outdoor weather enclosure for windblown dust and precipitation exposure. | Does not add the corrosion distinction of X-types or hose-directed-water protection of Type 4. | ||
| NEMA Type 3X | Indoor / outdoor | Falling dirt + windblown dust | Rain, sleet, snow | Yes | Undamaged by external ice | None | Type 3 environmental protection with an additional corrosion-protection distinction. | Not a substitute for Type 4X when hose-directed water is part of the exposure. | ||
| NEMA Type 3R | Indoor / outdoor | Falling dirt | Rain, sleet, snow | No | Undamaged by external ice | None | Indoor/outdoor enclosure focused on falling dirt and precipitation exposure. | Do not treat 3R as equivalent to Type 4 for hose-directed water or windblown-dust requirements. | ||
| NEMA Type 3RX | Indoor / outdoor | Falling dirt | Rain, sleet, snow | Yes | Undamaged by external ice | None | Type 3R environmental protection with an additional corrosion-protection distinction. | Not a hose-directed-water classification. | ||
| NEMA Type 3S | Indoor / outdoor | Falling dirt + windblown dust | Rain, sleet, snow | No | External mechanism remains operable when ice laden | None | Weather enclosure similar to Type 3, with an added requirement for external mechanisms to remain operable when ice laden. | Ice performance concerns external mechanism operation; it does not mean the enclosure prevents ice formation. | ||
| NEMA Type 3SX | Indoor / outdoor | Falling dirt + windblown dust | Rain, sleet, snow | Yes | External mechanism remains operable when ice laden | None | Type 3S environmental protection with an additional corrosion-protection distinction. | Not a hose-directed-water or submersion classification. | ||
| NEMA Type 4 | Indoor / outdoor | Falling dirt + windblown dust | Rain, sleet, snow, splash + hose-directed water | No | Undamaged by external ice | None | Indoor/outdoor enclosure for windblown dust, precipitation, splashing, and hose-directed water. | Does not include the additional corrosion-protection distinction associated with Type 4X. | ||
| NEMA Type 4X | Indoor / outdoor | Falling dirt + windblown dust | Rain, sleet, snow, splash + hose-directed water | Yes | Undamaged by external ice | None | Type 4 environmental protection with an additional corrosion-protection distinction. | Material alone does not establish a 4X rating; the complete enclosure assembly must meet the applicable requirements. | ||
| NEMA Type 5 | Indoor | Falling dirt + settling airborne dust/lint/fibers | Dripping + light splashing | No | — | None | Indoor enclosure for falling dirt, settling airborne dust/lint/fibers, and dripping or light splashing. | Not intended for outdoor weather or hose-directed-water exposure. | ||
| NEMA Type 6 | Indoor / outdoor | Falling dirt | Hose-directed water + occasional temporary submersion | No | Undamaged by external ice | Temporary | Indoor/outdoor enclosure that includes hose-directed water and occasional temporary submersion at limited depth. | Submersion is limited by the standard’s test conditions; do not infer unrestricted depth or duration. | ||
| NEMA Type 6P | Indoor / outdoor | Falling dirt | Hose-directed water + occasional prolonged submersion | Yes | Undamaged by external ice | Prolonged | Indoor/outdoor enclosure that includes prolonged submersion at limited depth plus an additional corrosion-protection distinction. | Does not mean unlimited or continuous submersion; verify the listed product and applicable test conditions. | ||
| NEMA Type 7 | Class I, Division 1 hazardous | — | — | — | — | — | Reference designation for Class I, Division 1 explosion-proof enclosures within the ANSI/NEMA EN 10250 hazardous-location scope. | Selection depends on the area classification and the referenced ANSI/UL 1203 and NEC requirements; weather or water inputs alone cannot establish suitability. | ||
| NEMA Type 9 | Class II, Division 1 hazardous | Dust-ignition-proof scope | — | — | — | — | Reference designation for Class II, Division 1 dust-ignition-proof enclosures within the ANSI/NEMA EN 10250 hazardous-location scope. | Selection depends on the combustible-dust area classification and the referenced ANSI/UL 1203 and NEC requirements; ordinary dust filters cannot establish suitability. | ||
| NEMA Type 12 | Indoor | Falling dirt + circulating dust/lint/fibers | Dripping + light splashing | No | — | None | Indoor enclosure without knockouts for circulating dust/lint/fibers and dripping or light splashing. | Indoor-only; compare with 12K when knockouts are required and with Type 13 for additional indoor liquid exposure distinctions. | ||
| NEMA Type 12K | Indoor | Falling dirt + circulating dust/lint/fibers | Dripping + light splashing | No | — | None | Indoor enclosure with knockouts for circulating dust/lint/fibers and dripping or light splashing. | Indoor-only; the K designation is tied to the knockout configuration. | ||
| NEMA Type 13 | Indoor | Falling dirt + circulating dust/lint/fibers | Spraying, splashing + seepage of water / oil / noncorrosive coolant | No | — | None | Indoor enclosure for dust/lint/fibers and defined spraying, splashing, or seepage of water, oil, and noncorrosive coolants. | Indoor-only; chemical compatibility and corrosive fluids require product-specific verification. | ||
NEMA Type numbers are classifications, not a linear “higher is better” scale. This chart independently summarizes major characteristics and does not reproduce the standard’s complete definitions, construction requirements, test methods, or acceptance criteria.
Comparison and table actions
Selected Type differences
Select up to three Types to compare only the characteristics that differ.
What NEMA Enclosure Ratings Mean
NEMA enclosure Types describe defined environmental protection characteristics for electrical equipment enclosures. ANSI/NEMA EN 10250-2024 covers electrical equipment rated not more than 1000 V and separates indoor Types, indoor/outdoor Types, and hazardous-classified-location Types.
This chart focuses on the 18 main Type designations. Current NEMA 10250 enclosure guidance also identifies ancillary ratings such as PW and XH for specialized cleaning/corrosion conditions; verify the current standard when those conditions are part of the specification.
The designation is not a single protection score. Type 4X adds a corrosion-related distinction to the Type 4 environmental envelope, while Type 6 and 6P address submersion conditions that are not represented by simply “going up” one Type number.
Fast interpretation
Start with the actual exposure—location, solids, water, corrosion, ice, and immersion—then verify the specific enclosure product. Do not select by Type number alone.
How to Use the NEMA Enclosure Rating Chart
- Identify location first. Separate indoor-only, indoor/outdoor, and hazardous/classified-location applications before comparing water or dust protection.
- Define the worst credible environmental exposure. Distinguish rain from washdown, windblown dust from indoor circulating dust, and temporary from prolonged submersion.
- Flag special conditions. Corrosion, external icing, knockouts, oils/coolants, and classified-location requirements can change the viable Type.
- Compare candidate rows. Use the selector as a screen, then compare the exact differences rather than choosing the numerically highest designation.
- Verify the complete product. Confirm listing/certification, entries, seals, doors, hardware, accessories, orientation, and manufacturer installation instructions.
Common NEMA Enclosure Types Compared
3R vs 4
Type 3R is commonly associated with outdoor precipitation protection, while Type 4 adds protection for splashing and hose-directed water and addresses windblown dust. A rain-rated enclosure should not automatically be treated as a washdown enclosure.
4 vs 4X
Type 4X carries the Type 4 environmental characteristics plus an additional level of corrosion protection. “4X” is a complete-enclosure performance designation, not merely a statement that the enclosure is stainless steel or nonmetallic.
6 vs 6P
Both address hose-directed water and submersion, but Type 6 is tied to occasional temporary submersion while Type 6P extends to occasional prolonged submersion and includes an additional corrosion-protection distinction.
12 vs 12K
Both are indoor Types for circulating dust/lint/fibers and dripping or light splashing. The key designation difference is that Type 12 is constructed without knockouts while Type 12K permits knockouts.
NEMA Ratings vs IP Ratings
NEMA Types and IEC IP codes overlap in the broad idea of enclosure protection, but they are not interchangeable classification systems. An IP code expresses defined ingress-protection characteristics through its characteristic numerals; a NEMA Type may address additional environmental and construction considerations.
Do not reverse-convert
Do not convert an IP code directly into a guaranteed NEMA Type. If an IP designation is specified, use the IP Rating Chart to interpret that code, then evaluate the applicable NEMA requirements separately.
Why the Complete Enclosure Assembly Matters
An enclosure Type applies to the completed enclosure configuration, not to a sheet of material by itself. Doors, gaskets, covers, fasteners, cable and conduit entries, vents, drains, operators, viewing windows, modifications, mounting orientation, and installation practices can affect the final protection provided.
For example, specifying “Type 4X material” is not equivalent to verifying that a finished assembly maintains the required Type 4X performance after penetrations and accessories are installed. Product instructions and the applicable listing or certification remain part of the engineering check.
Hazardous Locations Need Separate Evaluation
ANSI/NEMA EN 10250-2024 references Type 7 for Class I, Division 1 explosion-proof enclosures and Type 9 for Class II, Division 1 dust-ignition-proof enclosures. The standard points those hazardous-location requirements to ANSI/UL 1203, with the associated area classifications and installation requirements governed by the NEC.
The selector therefore stops at a classified-location warning instead of choosing between Types 7 and 9 from ordinary weather, water, or dust inputs. Area classification, the hazardous material present, equipment listing, temperature requirements, wiring methods, and applicable code provisions must be evaluated together.
Engineering Basis, Scope, and Data Rights
Basis: ANSI/NEMA EN 10250-2024 for current Type scope and hazardous-location references; independently transformed enclosure characteristics; UL 50E used only to explain the separate non-hazardous environmental certification/testing context.
This page is an independent educational transformation. It does not reproduce the complete NEMA or UL standards, normative test procedures, acceptance criteria, or proprietary standard tables, and bulk CSV export is intentionally disabled.
- ANSI — ANSI/NEMA EN 10250-2024, Enclosures for Electrical EquipmentLists ANSI/NEMA EN 10250-2024 as the most recent enclosure standard, with the ≤1000 V scope, indoor and indoor/outdoor Type groups, and Types 7 and 9 for hazardous classified locations, including the Type 7 Class I, Division 1 and Type 9 Class II, Division 1 references described by the current standard.
- NEMA — 2024 Standards PlanNEMA’s official standards plan identifies ANSI/NEMA EN 10250-2024, Enclosures for Electrical Equipment (1,000 Volts Maximum), as published. The page uses independently transformed summaries rather than reproducing normative tables or test text.
- UL Standards & Engagement — UL 50EEdition 3, published October 15, 2020; current catalog shows a revision dated October 17, 2025. Used for non-hazardous environmental certification/testing context, not as a replacement for ANSI/NEMA EN 10250-2024.
Dataset and Source-Check Details
- Dataset label
- nema-enclosure-types-en-10250-2024-transformed
- Publisher
- Turn2Engineering
- Controlling basis
- ANSI/NEMA EN 10250-2024
- Standard scope
- Electrical equipment enclosures rated not more than 1000 V
- Rows shown
- Types 1, 2, 3, 3X, 3R, 3RX, 3S, 3SX, 4, 4X, 5, 6, 6P, 7, 9, 12, 12K, 13
- Rights treatment
- Transformed educational summaries; no full standards-table reproduction or bulk download
- Source checked
- August 16, 2026
- Missing-value notation
- — means not represented or not applicable in this simplified comparison
Related Engineering References
NEMA Enclosure Rating FAQs
Type 4X adds an additional corrosion-protection distinction to Type 4, but “better” is too broad because the correct Type still depends on the application’s complete environmental and installation requirements.
Outdoor use alone is not enough to choose a Type; rain, windblown dust, hose-directed water, corrosion, icing, and submersion can move the screening result among several indoor/outdoor Types.
“Waterproof” is not a precise engineering description; Type 3R addresses defined outdoor precipitation conditions but should not be substituted for Type 4 hose-directed-water requirements.
No. The systems use different classification requirements, so an IP code should not be reverse-converted into a guaranteed NEMA enclosure Type.
No. A NEMA Type designation and third-party UL certification are different concepts; verify the actual product’s listing or certification and applicable product standard.
Use the Type as a Starting Point, Then Verify the Product
Use the chart to narrow the enclosure Types that fit the environment, compare the exact differences, and then confirm the current standard, product certification, enclosure configuration, and installation details. For an IP-specified project, evaluate the IP code separately rather than assuming a one-to-one conversion.