IP Ratings

NEMA Specifications


IP Ratings (aka International Protection Rating)

The information below is provided for the convenience of the visitors to our website, and is not intended to be complete or comprehensive in nature.

IP Indication Solid Particle Protection Liquid Ingress Protection Mechanical impact resistance Other Protections
IP Single Number: 0-6 Single Number: 0-8 Single Number: 0-9 Single Letter
Mandatory Mandatory Mandatory No longer used Optional

Solid particle protection

The first digit indicates the level of protection that the enclosure provides against access to hazardous parts (e.g., electrical conductors, moving parts) and the ingress of solid foreign objects.

Level Object size protected against Effective against
0 No protection against contact and ingress of objects
1 >50 mm Any large surface of the body, such as the back of a hand, but no protection against deliberate contact with a body part
2 >12.5 mm Fingers or similar objects
3 >2.5 mm Tools, thick wires, etc.
4 >1 mm Most wires, screws, etc.
5 Dust protected Ingress of dust is not entirely prevented, but it must not enter in sufficient quantity to interfere with the satisfactory operation of the equipment; complete protection against contact
6 Dust tight No ingress of dust; complete protection against contact

Liquid ingress protection

Protection of the equipment inside the enclosure against harmful ingress of water.

Level Protected against Testing for Details
0 Not protected
1 Dripping water Dripping water (vertically falling drops) shall have no harmful effect. Test duration: 10 minutes

Water equivalent to 1mm rainfall per minute

2 Dripping water when tilted up to 15 Vertically dripping water shall have no harmful effect when the enclosure is tilted at an angle up to 15 from its normal position. Test duration: 10 minutes

Water equivalent to 3mm rainfall per minute

3 Spraying water Water falling as a spray at any angle up to 60 from the vertical shall have no harmful effect. Test duration: 5 minutes

Water volume: 0.7 litres per minute
Pressure: 80100 kN/m

4 Splashing water Water splashing against the enclosure from any direction shall have no harmful effect. Test duration: 5 minutes

Water volume: 10 litres per minute
Pressure: 80100 kN/m

5 Water jets Water projected by a nozzle (6.3mm) against enclosure from any direction shall have no harmful effects. Test duration: at least 3 minutes

Water volume: 12.5 litres per minute
Pressure: 30 kN/m at distance of 3m

6 Powerful water jets Water projected in powerful jets (12.5mm nozzle) against the enclosure from any direction shall have no harmful effects. Test duration: at least 3 minutes

Water volume: 100 litres per minute
Pressure: 100 kN/m at distance of 3m

7 Immersion up to 1 m Ingress of water in harmful quantity shall not be possible when the enclosure is immersed in water under defined conditions of pressure and time (up to 1 m of submersion). Test duration: 30 minutes

Immersion at depth of 1m

8 Immersion beyond 1 m The equipment is suitable for continuous immersion in water under conditions which shall be specified by the manufacturer. Normally, this will mean that the equipment is hermetically sealed. However, with certain types of equipment, it can mean that water can enter but only in such a manner that it produces no harmful effects. Test duration: continuous immersion in water

Depth specified by manufacturer

NEMA Specifications
The following information is drawn from the National Electrical Manufacturers Association Publication #250.

DESCRIPTIONS, APPLICATIONS AND FEATURES OF ENCLOSURES FOR NON-HAZARDOUS LOCATIONS
TYPE 4 ENCLOSURES
Type 4 enclosures are intended for indoor or outdoor use primarily to provide a degree of protection against windblown dust and rain, splashing water, and hose-directed water; and to be undamaged by the formation of ice on the enclosure. They are not intended to provide protection against conditions such as internal condensation or internal icing.

TYPE 4X ENCLOSURES
Type 4X enclosures are intended for indoor or outdoor use primarily to provide a degree of protection against corrosion, windblown dust and rain, splashing water, and hose-directed water; and to be undamaged by the formation of ice on the enclosure. they are not intended to provide protection against conditions such as internal condensation or internal icing.

TYPE 12 ENCLOSURES
Type 12 enclosures are intended for indoor use primarily to provide a degree of protection against circulating dust, falling dirt, and dripping non-corrosive liquids. They are not intended to provide protection against such conditions as internal condensation. COMPARISON BETWEEN NEMA ENCLOSURE TYPE NUMBERS AND IEC ENCLOSURE CLASSIFICATION DESIGNATIONS

TABLE A-1 CONVERSION OF NEMA TYPE NUMBERS TO IEC CLASSIFICATION DESIGNATIONS (CANNOT BE USED TO CONVERT IEC CLASSIFICATION DESIGNATIONS TO NEMA TYPE NUMBERS)
NEMA Enclosure
Type Number
IEC Enclosure
Type Number
4 and 4X IP65
12 and 12K IP52
NOTE: The above comparison is based on tests specified in IEC Publication 529.

The above information is provided for the convenience of our customers. Miller Technologies makes no claims as to the accuracy of this information.