The IP Code indicates the degree of protection provided by enclosures for electrical equipment (i.e. IP65= No dust entry and protected against low pressure jet of water).
The first numeral indicates protection of persons against access to dangerous parts and protection of internal equipment against the ingress of solid foreign objects.
Protection unspecified (untested)
No special protection provided
Protection of hand against accidental access to dangerous parts, and protection of equipment against objects larger than 50mm
Protection of fingers against access to dangerous parts, and protection of equipment against objects larger than 12mm
Protection against objects larger than 2.5mm (e.g. tools, wires)
Protection against objects larger than 1mm (e.g. line tools, wires)
Protection against entry of dust in sufficient quantity to interfere with satisfactory operation of equipment
Complete protection against entry of dust
The second numeral indicates protection of internal equipment against harmful ingress of water.
Protection unspecified (untested)
No special protection provided
Protection against drops of water falling vertically
Protection against drops of water falling vertically when the object is tilted by up to 15 degrees from its normal position (in any direction)
Protection against spraying water at up to 60 degrees from the vertical
Protection against splashing and spraying water from all practicable directions
Protection against a low pressure jet of water from all practicable directions
Protection against heavy seas or a strong jet of water from all practicable directions
Protection against driving rain at angles down to horizontal
Protection against immersion
Protection against submersion (tests subject to agreement, but no less severe than numeral 7)