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What does IP Rating really mean ?

 

IP Rating          

 

 

IP (or "Ingress Protection") ratings is used to define levels of sealing effectiveness of electrical enclosures against intrusion of solid objects or water (moisture).

What do the numbers in an IP Rating mean?

The numbers that follow IP each have a specific meaning. 

  • The first digit represents protection against ingress of solid objects. 
  • The second digit represents protection against ingress of liquids. 

 

The tables below should help make sense of it:

 

 First Number Second Number
  Protection from entry of solid objects   Protection from entry of Liquids
0 No Protection 0 No Protection
1 Protection against objects larger than 50mm 1 Protection against drops of water falling vertically
2 Protection against objects larger than 12mm 2 Protection against drops of water falling vertically when fixture is tilted up to 15o
3 Protection against objects larger than 2.5mm 3 Protection against water falling as a spray at any angle up to 60o(rain)
4 Protection against objects larger than 1mm 4 Protection against splashes of water from any direction
5 Dust Protected 5 Protection from low pressure jet of water from any direction
6 Dust Tight 6 Protection from high pressure jet of water from any direction
    7 Protection from submersion up to 1m
    8 Protection from submersion beyond 1m

 

Common IP Ratings:

IP20 Ordinary
IP22 Drip Proof
IP23 Rain Proof
IP44 Splash Proof
IP55 Dust Proof, Jet Proof
IP64 Dust Tight, Splash Proof
IP65 Dust Tight, Jet Proof
IP67 Dust Tight, Watertight
IP68 Dust Tight, Pressure Watertight