IP-Schutzarten

Degrees of protection valid to DIN 40 050 are indicated by the IP code. The IP code consists of the letters IP (internal protection) followed by two digits indicating the degree of protection.

Valid for electrical equipment used in road vehicles to DIN 40 050 (part 9). 

• Predection of the electrical equipment inside the housing against the effects of solid foreign bodies including dust. 

• Predection of the electrical equipment inside the housing against 
  ingress of water. 

• Prevention of personnel touching hazardous parts¹) inside the housing.
  
    ¹) Moving, mechanical parts.

Fig.:
Elements of the IP code

If a digit is not given, it must be replaced by the letter "X" (i.e. "XX" if both digits are not given). Additional and/or supplementary letters can be omitted without having to be replaced.

²) The supplementary letter "K" stands either immediately after the first digits 5 and 6 or immediately after the second digits 4, 6, and 9.

³) With the water test. Example: IP16KB protection against the penetration of solid foreign bodies with diameter ³ 50 mm, protection against heavy jet water with high pressure, protection against contact with fingers.