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28 Process Fluid Control IP-Protection classes International Standard ISO20653 Degrees of protection (IP code) » Designations and definitions of types and degrees of protection provided by enclosures of electrical equipment for the: • protection of electrical equipment within the enclosure against ingress of foreign objects, including dust (protection against foreign objects) • protection of persons against access to hazardous parts inside the enclosure (protection against access) • protection of electrical equipment inside the enclosure against effects due to ingress of water (protection against water) » Requirements for each degree of protection » Tests to be carried out in order to confirm that the enclosure complies requirements of the relevant degree of protection (Where no code element is given, the letter "X" shall be substituted.) Examples for the use of letters in the IP code: IP6K9K > protection against dust (dust-tight) and protection against water (high-pressure/steam-jet cleaning) IPX6 > protection against water (strong high-velocity water) (Extract from the standard) The international standard specifies the following: The table contains an overview of the IP code elements: The international standard specifies the following: The international standard ISO20653 describes the degree of protection of electrical equipment against foreign objects, water and access. IP 6K 9K Second code element (code element 0 to 9K or letter X) First code element (code element 0 to 6K or letter X) Code letter (international protection) ELEMENT IP MEANING FOR THE PROTECTION OF ELECTRICAL EQUIPMENT MEANING FOR THE PROTECTION OF PER- SONS First code element Against foreign objects (including dust): Against access: 0 not protected not protected 1 with diameter ≥ 50 mm with back of hand 2 with diameter ≥ 12,5 mm with finger 3 with diameter ≥ 2,5 mm with tool 4 with diameter ≥ 1,0 mm with wire 5K dust-protected with wire 6K dust-tight with wire ELEMENT IP MEANING FOR THE PROTECTION OF ELECTRICAL EQUIPMENT MEANING FOR THE PROTECTION OF PER- SONS Second code element Against water: Not applicable 0 not protected 1 vertical water drips 2 water drips (15° inclination) 3 water spray 4 splash water 4K splash water with increased pressure 5 high-velocity water 6 strong high-velocity water 6K strong high-velocity water with increased pressure 7 temporary immersion 8 continuous submersion 9K high-pressure/steam-jet cleaning