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Measurement FundamentalsEnclosure Ratings

Enclosure ratings are set based on IEC (International Electrotechnical Commission) standards, a subcategory of JIS standards.

IP○●
  • IP: Ingress Protection
  • ○: Protection against intrusion of body parts and solid objects
  • ●: Protection against intrusion of water

Enclosure Ratings and Their Degree of Protection

Protection Against Intrusion of Body Parts and Solid Objects

Grade JIS standard Degree of protection
IP0●   No protection.
IP1● Protected against hands and other solid foreign objects (ø50 mm and greater).
IP2● Protected against fingertips and other solid foreign objects (ø12 mm and greater).
IP3● Protected against tools, wires, and other solid foreign objects (ø2.5 mm and greater).
IP4● Protected against tools, wires, and other solid foreign objects (ø1.0 mm and greater).
IP5● Dust-proof Protected from intrusion of dust at an amount that would interfere with normal operation.
IP6● Dust-proof Dust-tight.

Protection Against Intrusion of Water

Grade JIS standard Degree of protection
IP○0   No protection.
IP○1 Drip-proof I Protected against vertically falling water drops.
IP○2 Drip-proof II Protected against vertically falling water drops when enclosure is tilted up to 15°.
IP○3 Rain-proof Protected against vertically falling water drops when enclosure is tilted up to 60°.
IP○4 Splash-proof Protected against water splashed against the enclosure from any direction.
IP○5 Water-jet (washdown) resistant Protected against water projected in jets from any direction.
IP○6 Water-resistant Protected against water projected in powerful jets from any direction.
IP○7 Watertight Protected against temporary immersion in water.
IP○8 Submersible Protected against the effects of continuous immersion in water.

Written example: IP68 = Product that features a dust-tight structure while being protected against the effects of continuous immersion in water.

Enclosure Rating Combinations

Protection Against Intrusion of Water

0 1 2 3 4 5 6 7 8
0 IP00
1 IP10 IP11 IP12
2 IP20 IP21 IP22 IP23
3 IP30 IP31 IP32 IP33 IP34
4 IP40 IP41 IP42 IP43 IP44
5 IP50 IP51 IP52 IP53 IP54 IP55
6 IP60 IP64 IP65 IP66 IP67 IP68

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