IP Rating for Electrical Enclosure pdf

IP rating:

  • IP letters stand for “International Protection” rating or “Ingress Protection” rating. IP ratings are defined in international standard (British BS EN 60529, IEC 60509).
  • It is used to explain levels of sealing effectiveness of electrical enclosures against foreign bodies (tools, dirt etc) and moisture.

IP Rating for Electrical Enclosure pdf

Meaning of IP Rating:

  • The IP rating code is a two-digit (or optionally three-digit) designator to standardize the rating of protection level against intrusion of solids and liquids into mechanical and electrical enclosures. An enclosure can be a piece of equipment, an assembly unit, a cable or simply a connector.
  • The numbers of IP of each have a specific meaning.
  • First Number: The first Number indicates the degree of protection from moving parts, as well as the protection of enclosed equipment from foreign bodies.
  • Second Number: The second Number indicates the protection level that the enclosure enjoys from various forms of moisture (drips, sprays, submersion etc).
  • Third Number: The third digit in the designator is not part of the official IEC standard and is sometimes included (but more often omitted) to reference additional protections.

Abbreviation of IP Rating:

IP Rating Digits

IP Rating First Digit Second Digit Third Digit (Optional)
Solid Objects Protection Liquids Protection Mechanical impacts

0

No special protection No protection. No protection.
1 Protected against solid objects greater than 50mm in diameter ( such as large part of the body like hand) Protection against vertically falling drops of water e.g. condensation. Protects against impact of 0.225 joule (150 g weight falling from 15 cm height)
2 Protected against solid objects over 12 mm in diameter (person’s fingers) Protection against direct sprays of water up to 15° from the vertical. Protected against impact of 0.375 joule (250 g weight falling from 15 cm height)
3 Protected against solid objects not greater than 80mm in length and 12mm in diameter (tools and wires). Protected against direct sprays of water up to 60° from the vertical. Protected against impact of 0.500 joule (250 g weight falling from 20 cm height)
4 Protected against solid objects larger than 1 mm diameter (tools, wires, and small wires). Protection against water sprayed from all directions (limited ingress permitted). Protected against impact of 2.0 joule (500 g weight falling from 40 cm height)
5 Protected against dust limited ingress (no harmful deposit). Protected against low pressure jets of water from all directions (limited ingress). Protected against impact of 6.0 joule (1.5 kg weight falling from 40 cm height)
6 Totally dust tight. Protected against temporary flooding of water, e.g. for use on ship decks (limited ingress permitted). Protected against impact of 20.0 joule (5 kg weight falling from 40 cm height)
7 N/A Protected against the effect of immersion between 15 cm and 1 m. N/A
8 N/A Protects against long periods of immersion under pressure. N/A

Example:
IP65 Enclosure: IP rated as protection against dust (6) and protection from low water pressure (5).
IP66 Enclosure – IP rated as protection against dust (6) and protected against heavy seas or powerful jets of water (6)

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