IP (International Protection) protection grade system is drafted by IEC (International Electrotechnical Commission) to classify lamps according to their characteristics of dust-proof, foreign invasion prevention, water-proof and moisture-proof. The foreign objects mentioned here, including tools and human fingers, shall not touch the live parts in the lamps to avoid electric shock. IP protection level is composed of two numbers.
**The number indicates the level of dust-proof and foreign object prevention of the lamp;
**Numbers indicate the tightness of the lamp against moisture and water intrusion. The larger the number, the higher the protection level. The protection levels indicated by the two marked numbers are shown in Table 1 and table 2** The degree of protection indicated by the identification characteristic number * * identification numbers: 0 no protection, no special protection for external people or objects IP0 - 1 prevent solid objects larger than 50mm from invading, and prevent human body (such as palm) from accidentally contacting parts inside the lamp. Prevent foreign objects with larger size (diameter greater than 50mm) from invading ip1-2 prevent solid objects larger than 12mm from invading, and prevent human fingers from contacting parts inside the lamp. Prevent medium-sized (diameter greater than 12mm and length greater than 80mm) foreign objects from intruding IP2 - 3 prevent solid objects greater than 2.5mm from intruding, prevent tools, wires or similar small foreign objects with diameter or thickness greater than 2.5mm from intruding into the internal parts of lamps IP3 - 4 prevent solid objects greater than 1.0mm from intruding Ip4-5 dust-proof for the internal parts of lamps and lanterns exposed to the invasion of wires or similar small foreign objects, completely preventing the invasion of foreign objects. Although it can not completely prevent dust intrusion, the amount of dust intrusion will not affect the normal operation of the lamp. IP5 - 6 dust density completely prevents the intrusion of foreign objects, and can completely prevent the intrusion of dust. IP6 - * * marked characteristic numbers (numbers) refer to the degree of protection * * marked numbers: 0 no protection, no special protection for external people or objects ip-0 1 prevent the intrusion of dripping water, The vertical dripping water (such as condensed water) will not cause harmful effects on the lamps. When the lamp is tilted by 15 °, the dripping water can still be prevented from intruding. When the lamp is tilted from vertical to 15 °, the dripping water will not cause harmful effects on the lamps. Ip-2 3 prevents the spraying water from intruding, and prevents the rain or the water sprayed in the direction with an angle less than 60 ° from the vertical from entering the lamps and causing damage. Ip-3 4 prevents the splashing water from intruding, Prevent the water splashed from all directions from entering the luminaire to cause damage ip-4 5 prevent the water sprayed from all directions from entering the luminaire to cause damage ip-56 prevent the water sprayed from the nozzles from entering the luminaire to cause damage ip-56 prevent the intrusion of big waves the luminaire installed on the deck to prevent the damage caused by flooding due to the invasion of big waves IP-6 7 prevent the intrusion of water during flooding, If the lamp is immersed in water for a certain time or the water pressure is below a certain standard, it can ensure that it will not damage ip-7 8 due to water inflow and prevent water intrusion during sinking. If the lamp sinks indefinitely earlier than the specified water pressure, it can ensure that it will not damage ip-8 due to water inflow