With regard to the suitability for various ambient conditions, the systems are subdivided into respective protection types, the so called IP-codes. There are laid down in the DIN EN 60529 under the title protection types provided by enclosures (IP code). The letters IP always being part of the designation of the protection type are appended a double-digit number. This number indicates the scope of protection offered by an enclosure with regard to contact or foreign bodies (first digit) and moisture (second digit).
