Tivoli audio presents the Songbook and the PAL players

IP Rating

A two digit number is used represent the resistance of an electrical item (or its enclosure) to environmental effects:

  • The first digit represents protection against ingress of solid objects
  • The second digit represents protection against ingress of liquids
  • The third digit (optional) represents mechanical impact damage

The larger the value of each digit, the greater the protection from that effect. For example, a product rated as IP57 would be better protected against environmental factors than another similar product that was only rated as IP43 or to put it another way an item rated at IP67 would be totally protected against dust ingress and withstand immersion in water up to a depth of 1m for at least 30 minutes.

             
  1st Definition 2nd Definition 3rd Definition
             
  0 No protection 0 No protection 0 No protection
  1 Protected against solids objects over 50mm 1 Protected against vertically falling drops of water 1 Protected against 0.225 joule impact (150g @ 15cm)
  2 Protected against solids objects over 12mm 2 Protected against direct sprays up to 15° from the vertical 2 Protected against 0.375 joule impact (250g @ 15cm)
  3 Protected against solids objects over 2.5mm 3 Protected against direct sprays up to 60° from the vertical 3 Protected against 0.5 joule impact (250g @ 20cm)
  4 Protected against solids objects over 1mm 4 Protected against sprays from all directions    
  5 Protected against dust 5 Protected against low pressure jets of water from all directions 5 Protected against 2.0 joule impact (500g @ 40cm)
  6 Totally protected against dust 6 Protected against strong jets of water    
      7 Protected against the effects of temporary immersion between 15cm and 1m for at least 30 minutes 7 Protected against 6.0 joule impact (1.5kg @ 40cm)
      8 Protected against long periods of immersion under pressure    
          9 Protected against 20 joule impact (5kg @ 40cm)

 
   
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