IP68 is the classification of waterproof and dustproof. It is the protection level of the electrical equipment shell against the invasion of foreign matters. The source is the Standard IEC 60529 of the International Electrotechnical Commission, which was also adopted as the American national standard in 2004. In this standard, for the protection of electrical equipment shell against foreign matters, the format of IP grade is ipxx, where XX is two Arabic numerals. The first marked number represents the protection grade of contact protection and foreign objects, and the second marked number represents the waterproof protection grade. IP is the code used internationally to identify the protection grade. IP grade is composed of two numbers, and the first number represents dust prevention; The second number indicates waterproof. The larger the number, the better the protection.
According to IEC 529-598 and GB 7000-96, it is classified according to the degree of protection against the invasion of foreign matters and water. For example, IP65, the first digit corresponds to grade 6 in (1), indicating complete dust prevention. The second digit corresponds to grade 5 in (2), which means to prevent water spray from entering, and so on.
6 dust tight (completely dustproof) no dust is allowed to enter