NEMA and IEC Enclosure Classifications

Comprehensive reference tool for NEMA and IEC enclosure classifications, including environmental protection ratings, ingress protection (IP) ratings, and application guidelines for indoor and outdoor environments.

NEMA TypeDescriptionEnvironmentIP RatingDust ProtectionWater Protection
1General PurposeIndoorIP10Protected against solid objects up to 50mm (accidental touch)None
2Drip-ProofIndoorIP11Protected against solid objects up to 50mm (accidental touch)Vertically falling drops (e.g., condensation)
3Dust-tight, Rain-tight, Sleet-tightOutdoorIP54Protected against dust limited ingress (no harmful deposit)Water sprayed from all directions, limited ingress
3RRain-tight, Sleet ResistantOutdoorIP14Protected against solid objects up to 50mm (accidental touch)Water sprayed from all directions, limited ingress
3SDust-tight, Rain-tight, Sleet-tightOutdoorIP54Protected against dust limited ingress (no harmful deposit)Water sprayed from all directions, limited ingress
4Water-tight, Dust-tight, Sleet ResistantIndoor & OutdoorIP56Protected against dust limited ingress (no harmful deposit)Water sprayed from all directions, limited ingress
4XWater-tight, Dust-tight, Corrosion-ResistantIndoor & OutdoorIP56Protected against dust limited ingress (no harmful deposit)Water sprayed from all directions, limited ingress
5Dust-tight, Drip-ProofIndoorIP52Protected against dust limited ingress (no harmful deposit)Direct sprays of water up to 15° from vertical
6Occasionally Submersible, Watertight, Sleet ResistantIndoor & OutdoorIP67Totally protected against dustImmersion between 15cm and 1m
6PWater-tight, Sleet Resistant, Prolonged SubmersionIndoor & OutdoorIP67Totally protected against dustImmersion between 15cm and 1m
12Dust-tight and Drip-tightIndoorIP52Protected against dust limited ingress (no harmful deposit)Direct sprays of water up to 15° from vertical
12KDust-tight and Drip-tight, with KnockoutsIndoorIP52Protected against dust limited ingress (no harmful deposit)Direct sprays of water up to 15° from vertical
13Oil-tight and Dust-tightIndoorIP54Protected against dust limited ingress (no harmful deposit)Water sprayed from all directions, limited ingress

IP Rating Explained

IP (Ingress Protection) Rating Format: IPXY

  • X (First Digit - Dust Protection): 0-6

    • 0: No protection
    • 1: Protected against solid objects >50mm
    • 2: Protected against solid objects >12.5mm
    • 3: Protected against solid objects >2.5mm
    • 4: Protected against solid objects >1mm
    • 5: Limited dust ingress (no harmful deposit)
    • 6: Totally protected against dust

  • Y (Second Digit - Water Protection): 0-8

    • 0: No protection
    • 1: Dripping water (vertical)
    • 2: Dripping water (up to 15°)
    • 3: Spraying water (up to 60°)
    • 4: Splashing water from all directions
    • 5: Water jets from all directions
    • 6: Powerful water jets
    • 7: Immersion up to 1m for up to 30 minutes
    • 8: Prolonged immersion under pressure

NEMA vs IEC Standards

  • NEMA (National Electrical Manufacturers Association): Primarily used in North America
  • IEC (International Electrotechnical Commission): International standard (IP ratings)

NEMA types provide practical descriptions, while IEC IP ratings provide more specific technical classifications.

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