NEMA enclosure classifications versus IEC enclosure classifications
NEMA enclosure classifications are developed by the National Electrical Manufacturers Association (NEMA) and used in the U.S./American market.
Ingress Protection – IP – ratings are developed by the European Committee for Electro Technical Standardization (CENELEC) (described IEC/EN 60529), and specifies the environmental protection and enclosure provided.
The table below can be used to convert from NEMA Enclosure Types to IEC Enclosure Types:
Note! NEMA standards meet or exceed IEC standards. The conversion does not work in the opposite direction.
|NEMA Enclosure Type||IEC Enclosure IP Code|
|1||General Purpose – Indoor||IP 10|
|2||Drip-Proof – Indoor||IP 11|
|3||Dust-tight, Rain-tight, Sleet-tight – Outdoor||IP 54|
|3R||Rain-tight, Sleet Resistant – Outdoor||IP 14|
|3S||Dust-tight, Rain-tight, Sleet-tight – Outdoor||IP 54|
|4||Water-tight, Dust-tight, Sleet Resistant – Indoor & Outdoor||IP 56|
|4X||Water-tight, Dust-tight, Corrosion-Resistant – Indoor & Outdoor||IP 56|
|5||Dust-tight, Drip-Proof – Indoor||IP 52|
|6||Occasionally Submersible, Watertight, Sleet Resistant – Indoor & Outdoor||IP 67|
|6P||Water-tight, Sleet Resistant- Prolonged Submersion – Indoor & Outdoor||IP 67|
|12||Dust-tight and Drip-tight- Indoor||IP 52|
|12K||Dust-tight and Drip-tight, with Knockouts – Indoor||IP 52|
|13||Oil-tight and Dust-tight – Indoor||IP 54|