Converting from NEMA to IEC Enclosure Classifications

Converting from NEMA enclosure classifications to IEC enclosure classifications

NEMA enclosure classifications are developed by 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:

NEMA Enclosure Types IEC Enclosure Classification Designation
1 General Purpose - Indoor IP10 Protected against solid objects up to 50mm, e.g. accidental touch by hands.
2 Drip-Proof - Indoor IP11 Protected against solid objects up to 50mm, e.g. accidental touch by hands.
Protection against vertically falling drops of water e.g. condensation.
3 Dusttight, Raintight, Sleettight - Outdoor IP54 Protected against dust limited ingress (no harmful deposit).
Protection against water sprayed from all directions, limited ingress permitted.
3R Raintight, Sleet Resistant- Outdoor IP14 Protected against solid objects up to 50mm, e.g. accidental touch by hands.
Protection against water sprayed from all directions, limited ingress permitted.
3S Dusttight, Raintight, Sleettight- Outdoor IP54 Protected against dust limited ingress (no harmful deposit).
Protection against water sprayed from all directions, limited ingress permitted.
4 Watertight, Dusttight, Sleet Resistant-Indoor & Outdoor IP56 Protected against dust limited ingress (no harmful deposit).
4X Watertight, Dusttight, Corrosion-Resistant- Indoor & Outdoor IP56 Protected against dust limited ingress (no harmful deposit).
5 Dusttight, Drip-Proof--Indoor IP52 Protected against dust limited ingress (no harmful deposit).
Protection against direct sprays of water up to 15o from the vertical.
6 Occasionally Submersible, Watertight, Sleet Resistant- Indoor & Outdoor IP67 Totally protected against dust.
Protected against the effect of immersion between 15cm and 1m.
6P Watertight, Sleet Resistant- Prolonged Submersion- Indoor & Outdoor IP67 Totally protected against dust.
Protected against the effect of immersion between 15cm and 1m.
12 Dusttight and Driptight- Indoor IP52 Protected against dust limited ingress (no harmful deposit).
Protection against direct sprays of water up to 15o from the vertical.
12K Dusttight and Driptight, with Knockouts- Indoor IP52 Protected against dust limited ingress (no harmful deposit).
Protection against direct sprays of water up to 15o from the vertical.
13 Oiltight and Dusttight- Indoor IP54 Protected against dust limited ingress (no harmful deposit).
Protection against water sprayed from all directions, limited ingress permitted.

Note! NEMA standards meet or exceed IEC standards. The conversion does not work in the opposite direction.

Related Topics

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