IP is the abbreviation of Ingress Protection. The IP rating is the protection level against foreign objects
in the electrical equipment enclosure. The source is the International Electrotechnical Commission's
standard IEC 60529, which was also adopted as the US national standard in 2004.
The relevant test basis in China is GB 4208-2008/IEC 60529-2001 "Shell protection grade (IP code)"
standard requirements, the conformity assessment test for the enclosure protection grade of various
products; the highest detection grade IP68. Regular product inspection levels include IP23, IP44, IP54,
IP55, IP65, IP66, IP67, IP68.
The purpose of the test criteria is as follows:
Specify the degree of enclosure protection specified by the electrical equipment load;
Prevent the human body from accessing dangerous parts inside the casing;
Prevent solid foreign matter from entering the equipment inside the casing;
Prevents harmful effects on equipment due to water entering the enclosure.