What is the IP protection grade?

IP protection grade system is by IEC (INTERNATIONAL ELECTROTECHNICAL appointed the drafts the electrically classification according the characteristic of the dust-proof and moisture. I said dustproof level, waterproofing of P said. For example BX5800 pull rope switch is IP67, said can completely prevent the dusts into, at the same times can soak 1 meter under water depth more than half an hour without water. IP protection grade system using IEC 60529:60529 international standards, by the state administration of quality supervision and commission jointly issued the national standard management, all the technical content of this standard is mandatory. The IP code standard electrical equipment enclosure is expounded to provide protection grade classification system, applicable to the rated voltage is less than 72.5 KV electrical equipment. Purpose is to prevent Human body close to the inside of shell dangerous parts; prevent solid foreign material into the shells equipment. And prevent the liquid into the shells. “I” represent to prevent solid dust level, P is to prevent liquid water invasion the higher the number represents the stronger the protection capability, equipment, safety performance is higher.

Two marked number represents protection grade, such as a table (I) and shown in table 2 (P) (see attachment) test condition:

Digital	Scope of protection	instructions
Zero	unprotected	-
One	Prevent not less than 50 mm diameter solid foreign body	A diameter of 50 mm spherical object test may not be completely into the shell
Two	Prevent not less than 12.5 mm diameter solid foreign body	Diameter of 12.5 mm spherical object test may not be completely into the shell
Three	Prevent not less than 2.5 mm diameter solid foreign body	Diameter of 2.5 mm spherical object test may not be completely into the shell
Four	Prevent not less than 1.0 mm diameter solid foreign body	Diameter of 1.0 mm spherical object test may not be completely into the shell
Five	Dustproofs	Can't completely prevent dust from entering the, but into the amount of dust will not affect the normal operation of the equipment
Six	Dust tight	Prevent dust from entering the completely

(Table One)

digital	Scope of protection	instructions
Zero	Unprotected	-
One	To prevent the vertical drop of water	Vertical drop of water should be no harmful effects
Two	To prevent the shell within 15 ° inclined vertical drop of water	When the shell each vertical plane within 15 ° inclination, vertical drop of water should be no harmful effects
Three	Water spray water	The vertical plane within 60 ° to drench water, no harmful effects
Four	Splash water	Splash water had no harmful effect to the shell each direction
Five	The water spray	Water had no harmful effect to the shell each direction
Six	Strong water proof	Strong water jet had no harmful effect to the shell each direction
Seven	The short time of flooding	Pressure of the water immersion regulations stipulated time after the shell into the water not to harmful degree
Eight	Proof for diving	Indefinitely in specified under water pressure, casing into the water not to harmful degree

(Table Two)