IP is an abbreviation for Ingress Protection, IP rating for electrical equipment enclosure protection level of foreign invasion, the source is the standard of the International Electrotechnical Commission IEC 60529, this standard has also been adopted in 2004 as the American National Standards. In this standard, for electrical equipment enclosure for foreign body protection, IP rating format IPXX, where XX is the two digits, the first digit represents the contact mark protection and the protection level of foreign objects, the second digit represents waterproof protection level mark specific level of protection can refer to the following table. IP is the international code used to identify the degree of protection Ip rating by two figures, the first number indicates the dust; the second number represents water from the greater the number, the better protection, and its leader. Dustproof numbers define the degree of protection 0 No protection No special protection to prevent more than one object of 50mm prevent human intrusion inadvertently encountered inside the lamp body parts to prevent the 50mm diameter greater than 2 to prevent the intrusion of an object larger than the 12mm prevent invasive finger touch lamps 3 to prevent the internal parts is greater than the whole thing 2.5mm diameter greater than 2.5mm prevent invasive tools, wires or objects to prevent the intrusion of an object greater than four 1.0mm diameter greater than 1.0 to prevent the invasion of mosquitoes, insects or objects can not completely prevent the intrusion of dust and dirt 5 invasion, but will not affect the amount of dust invade the normal operation of the lamp 6 completely prevent dust intrusion waterproof and dustproof grade numbers define the degree of protection 0 No protection No special protection to prevent an invasion to prevent water droplets dripping drops of two vertical tilt of 15 degrees is still dripping prevent intrusion When the lamp tilted 15 degrees, you can still prevent dripping water spray to prevent the intrusion of 3 to prevent rain, or vertical angle of less than 50 degrees into the direction of the jet of water 4 to prevent splashing water splashing from all directions to prevent the intrusion of water to prevent the intrusion of 5 Big Wave Big Wave prevent water intrusion or blowhole spray water rapidly to prevent the intrusion of big waves of water intrusion 6 lamps invade the water at a certain time or pressure conditions, still ensure the normal operation of the lamp to prevent the intrusion of water seven lamps without water intrusion period sank in water under certain pressure conditions, and ensure the normal operation of the lamp 8 to prevent the sinking of the impact IP (INTERNATIONAL PROTECTION) rating is based on the standards are: 1) by IEC (INTERNATIONAL ELECTROTECHNICAL COMMISSION) the drafting of international protection and waterproofing Test Standard: International Electrotechnical Commission standard IEC 529-5982) GB GB 700-863) GB 4208 and so on.