Classified according to the degree of protection of the enclosure: in order to prevent dust, solid foreign objects and water from entering the lamp cavity, touching or accumulating on live parts and causing dangers such as flashover, short circuit or damage to electrical insulation, there are various enclosure protection methods to protect electrical The role of insulation. The enclosure protection level is characterized by the characteristic letter "IP" followed by two numbers. The first number indicates the protection against people, solid foreign objects or dust. Divided into 0-6 grades. Explosion-proof lamps are sealed lamps, and their dustproof ability is at least grade 4. The second number indicates the protection ability against water, which is divided into grades 0-8. explosion proof light