IP Protection Test

Regen
Protected systems are classified in so-called IP-codes as regards their suitability for different environmental conditions. The abbreviation IP stands for “International Protection”. In some cases the abbreviation also stands for “Ingress Protection” in English-speaking countries.

There are various German and international standards for the IP-codes:
  • DIN EN 60529; VDE 0470-1 Degrees of Protection provided by Enclosures (IP-Code)
  • ISO 20653 Road vehicles -- Degrees of protection (IP-Code) (replacing DIN 40050)
  • DIN EN 60068-2-18 Umweltprüfungen: Wasser
  • MIL-STD-810G Rain
  • RTCA/DO-160G Waterproofness
  • NEMA 250
  • VW 80000

All standards are equally valid but differ regarding revision status and details. It is therefore necessary to indicate the referenced standard for an unequivocal determination of IP-codes.

First digit of IP-Codes

1.digit Meaning
ISO 20653 DIN EN 60529 Protection against objects Effective against
0 0 no protection no protection
1 1 solid objects ≥ 50mm Any large surface of the body, such as the back of a hand, but no protection against deliberate contact with a body part
2 2 solid objects ≥ 12,5mm Fingers or similar objects
3 3 solid objects ≥ 2,5mm Tools, thick wires, etc.
4 4 solid objects ≥ 1mm Most wires, screws, etc.
5K 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
6K 6 dust tight No ingress of dust; complete protection against contact

Second digit of IP-Codes

2.digit Meaning
ISO 20653 DIN EN 60529 Protection against water
0 0 no protection
1 1 Dripping water (vertically falling drops) shall have no harmful effect.
2 2 Vertically dripping water shall have no harmful effect when the enclosure is tilted at an angle up to 15° from its normal position.
3 3 Water falling as a spray at any angle up to 60° from the vertical shall have no harmful effect.
4 4 Water splashing against the enclosure from any direction shall have no harmful effect.
4K   Water splashing against the enclosure from any direction with hightened pressure shall have no harmful effect.
5 5 Water projected by a nozzle (6.3 mm) against enclosure from any direction shall have no harmful effects.
6 6 Water projected in powerful jets (12.5 mm nozzle) against the enclosure from any direction shall have no harmful effects.
6K   Water projected in powerful jets with higher pressure against the enclosure from any direction shall have no harmful effects.
7 7 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 8 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.
  9 Protected against close-range high pressure, high temperature spray downs.
9K   Protected against close-range high pressure, high temperature spray downs, specific for cars.