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What does IP rating stand for?
IP stands for International Protection
The IP code consists of two numbers and an optional supplementary letter.
First Characteristic Numeral - Against ingress of foreign objects
PURPOSE: Indicates the degree of protection provided by an enclosure with respect to:
- Protection of persons against approach to live parts or contact with live or moving parts inside the enclosure
- Protection of equipment within the enclosure against the ingress of solid foreign bodies.
The codes are as follows:
0 Non-protected 1 >=50mm diameter 2 >=12.5mm diameter 3 >=2.5mm diameter 4 >=1.0mm diameter 5 Dust protected 6 Dust tight
Second Characteristic Numeral - Against ingress of water with harmful effects.
PURPOSE: Indicates the degree of protection provided by an enclosure with respect to protection of equipment within the enclosure against the harmful ingress of water.The codes are as follows:
0 Non protected 1 Vertically dripping 2 Dripping (15 degrees tilted) 3 Spraying 4 Splashing 5 Jetting 6 Power jetting 7 Temporary immersion 8 Continuous immersion
Supplementary Letter (optional)
H High voltage apparatus M Tested against the ingress of water when the machine is in operation S Tested against the ingress of water when the machine is not running W Suitable under specified weather conditions
For example: IP55 refers to an enclosure that is dust protected and shielded against jets of water. IP67 refers to an enclosure that is dust tight and can be temporarily immersed.
NEMA stands for the National Electrical Manufacturers Association. The organisation has established standards for enclosure construction for control equipment. Enclosures are intended to protect personnel against accidental contact with enclosed electrical equipment and internal devices against specified external conditions. The enclosed devices are intended to operate in air unless otherwise specified. There are various types available, such as:
| Type 1 | General purposes - use indoors where they are not exposed to unusual service conditions. |
| Type 3 | Dust tight, rain tight and sleet resistant - use outdoors to protect against windblown dust and water. |
| Type 3R | Rainproof and sleet resistant - use outdoors to protect against rain. |
| Type 4 | Water tight and dust tight - use indoors or outdoors to protect against splashing water, seepage of water, falling or hose directed water and severe external condensation. |
| Type 4X | Water tight, Dust tight and Corrosion resistant - meet Type 4 requirements and are corrosion resistant |
| Type 7 | Hazardous Gas Location - designed to contain explosions of flammable mixtures of specified gases or vapours. |
| Type 9 | Hazardous Dust Location - designed to prevent the ingress of explosive amounts of hazardous dust. |
| Type 12 | Industrial use, Dust tight and Drip tight - intended to protect against fibres, flyings, lint, dust, dirt and light splashing, seepage, dripping and external condensation of non-corrosive liquids. It can also be modified for outside use. |
| Type 13 | Oil tight and Dust tight - intended for outdoor use, primarily to house enclosures subjected to oils and coolants. |
Manufacturers and Suppliers
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