Table
Panel Enclosure NEMA/CSA Type Ratings
Panel Enclosure NEMA/CSA Type Ratings reference with assumptions and boundary notes.
Reference boundary
Enclosure-type reference only. It does not approve a panel location, installation, corrosion exposure, washdown exposure, or hazardous location use.
Reference table
Compare common enclosure type markings by environmental protection meaning and typical reference use.
| Enclosure type | Common location use | Protection summary | Boundary |
|---|---|---|---|
| Type 1 | Indoor general-purpose | Incidental contact and limited indoor dust protection | Not an outdoor or wet-location enclosure reference |
| Type 3R | Outdoor rain and sleet reference | Weather-resistant outdoor enclosure with limited falling-rain protection | Not a washdown or corrosion-resistance substitute |
| Type 4 | Indoor or outdoor washdown reference | Protection against splashing water, hose-directed water, and windblown dust | Corrosion exposure depends on material and marking |
| Type 4X | Indoor or outdoor corrosion-reference applications | Type 4-style water protection plus additional corrosion resistance | Material, gasket, hardware, and environment still need product review |
| Type 12 | Indoor industrial reference | Dust, falling dirt, and dripping non-corrosive liquid protection | Not an outdoor rain or washdown enclosure reference |
Use notes
- Use this table for preliminary reference and arithmetic checks only.
- Confirm equipment ratings, product markings, installation conditions, utility requirements, and the local authority requirements before design or field use.