What do the Waterproof Ratings for Electronic Equipment mean?

What do the Waterproof Ratings for Electronic Equipment mean?

A two-digit number (as specified in Australian Standards AS60529 and EN60529) is used to provide an IP Rating to a piece of electronic equipment or to an enclosure for electronic equipment.

The two digits represent two different forms of environmental influence:

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

The larger the value of each digit, the greater the protection from that influence. As an example, a product such as the Icom IC-M33 is rated IPX7, which would be better protected against environmental factors than another similar product that was only rated as IP54.

Value
First Digit
Protection against ingress of solids
Second Digit
Protection against ingress of liquids
0No protectionNo Protection
1Protected against solid objects over 50mm e.g. hands, large toolsProtected against vertically falling drops of water.
2Protected against solid objects over 12mm e.g. hands, large toolsProtected against direct sprays of water up to 15° from vertical.
3Protected against solid objects over 2.5mm e.g. wire, small toolsProtected against direct sprays of water up to 60° from vertical.
4Protected against solid objects over 1.0mm e.g. wiresProtected against water sprayed from any direction. Limited ingress permitted.
5Limited protection against dust ingress (no harmful deposit)Protected against low pressure water jets from any direction. Limited ingress permitted.
6Totally protected against dust ingress.Protected against high pressure water jets from any direction. Limited ingress permitted.
7 XProtected against immersion between 15cm and 1M.
8 XProtected against long periods of immersion under pressure.