7. What is the IP55 protection rating?

There are various German and international standards for IP codes.

• DIN EN 60529 (VDE 0470-1): 2014-09 Degrees of protection provided by enclosures (IP code) (IEC 60529:1989 + A1 :1999 + A2:2013); German version EN 60529:1991 + A1:2000 + A2:2013, formerly VDE 0470-1^[3]
• ISO 20653:2013 Road vehicles - Degrees of protection (IP code) - Protection against foreign objects, water and contact - Electrical equipment describes the current status for road vehicles with extensions to the coding of the degree of protection compared to earlier DIN standards.

All standards are valid, but differ in their revision status and details. When specifying IP codes, it is necessary to specify the reference standard for unambiguous coding.

As the meanings of the types of protection within the respective standards have also changed compared to previous editions, it is also necessary to always state the number and publication date of the standard in order to establish a clear reference.