IP rating (water)

In our wetrooms we assess the protection of our luminaires against ingress of water, varying over differing degrees of protection, depending upon the requirements for the different types of lighting product.

According to the IP code, products are provided with a two-digit IP rating, e.g. IP22, IP 44 etc. The first digit indicates the product's level of protection against the ingress of solid foreign objects, while the second digit relates to the eight degrees of protection against ingress of water:

  1. Dripping water:  Dripping water (vertically falling drops) shall have no harmful effect.
  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.
  3. Spraying water:  Water falling as a spray at any angle up to 60° from the vertical shall have no harmful effect.
  4. Splashing of water:  Water splashing against the enclosure from any direction shall have no harmful effect.
  5. Water jets:  Water projected by a nozzle (6.3 mm) against enclosure from any direction shall have no harmful effects.
  6. Powerful water jets:  Water projected in powerful jets (12.5 mm nozzle) against the enclosure from any direction shall have no harmful effects.
  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).
  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.