About IP Ratings

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A two-digit rating system established by the International Electrotechnical Commission, used to identify the level of protection against the ingress (entry) of foreign objects into the enclosure for a piece of electronic equipment.
As referenced in IEC/EN 60 529 standards, a product’s ingress protection is indicated by the two code letters IP followed by two numerals, each representing different forms of environmental influence. The larger the value of each digit, the greater the protection.

IP TABLE

  First digit:
Ingress of solid objects
Second digit:
Ingress of liquids
0 No protection No protection
1 Protected against solid objects over 50mm e.g. hands, large tools. Protected against vertically falling drops of water or condensation.
2 Protected against solid objects over 12.5mm e.g. hands, large tools. Protected against falling drops of water, if the case is disposed up to 15 from vertical.
3 Protected against solid objects over 2.5mm e.g. wire, small tools. Protected against sprays of water from any direction, even if the case is disposed up to 60from vertical.
4 Protected against solid objects over 1.0mm e.g. wires. Protected against splash water from any direction.
5 Limited protection against dust ingress.
(no harmful deposit)
Protected against low pressure water jets from any direction. Limited ingress permitted.
6 Totally protected against dust ingress. Protected against high pressure water jets from any direction. Limited ingress permitted.
7 N/A Protected against short periods of immersion in water.
8 N/A Protected against long, durable periods of immersion in water.

Example: IP65 rated LED flood light
The two digits represent different forms of environmental influence:
  • The first digit (6) indicates protection against the ingress of dust and all other solid objects.
  • The second digit (5) indicates protection against low pressure jets of water from any direction.
This IP65 rated outdoor LED light would be better protected against environmental factors than another similar product rated as, for example, IP42.
Note: Some manufacturers may also rate the ingress protection of a product using NEMA 250-2003 standards. For definitions of these enclosure types see the NEMA site.