IP (Ingress protection) rating of motors

                      IP( Ingress protection )code in the name plate of a motor used to specify the environmental protection such as,
* protection from solid particles
* protection from liquids
* protection against mechanical impact.
             IP (Ingress Protection) codes define how well an enclosure protects against the external environment. As the number gets higher, the protection gets better. The first digit defines the protection level against "solids", the second against "liquids". You MUST use both digits to define an enclosure.

 For the first digit:
 0 = No protection
 1 = Protected against objects greater than 50 mm diameter
 2 = Protected against objects greater than 12 mm diameter
 3 = Protected against objects greater than 2.5 mm diameter
 4 = Protected against objects greater than 1.0 mm diameter
 5 = Dust protected 6 = Dust tight
 For the second digit:
 0 = Not protected
 1 = Protected against dripping water (i.e. vertical plane)
 2 = Protected against dripping water up to 15 degree angle
 3 = Protected against spraying water
 4 = Protected against splashing water
 5 = Protected against water jets
 6 = Protected against heavy seas
 7 = Protected against effects of immersion
 8 = Protected against submersion
   
         If there is a third digit it will represents mechanical protection also....

Example: IP 543
  here 5 stands for represent protection from solid particles
          4 represents protection from liquid particles
          3 represents mechanical protection.