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          The meaning of protection degree code

          Protection degree for nonego
           
          Character No.
          Character sign
          Brief description
          Type Number Nomenclature
          ×
           Exempt from testing

           While omitting and don't mark the protection charater

           Exempt from protection

           Without special protection

          1

           Protected against
           solid bodies whose
           Dia.less than 50mm
           It can protect against solid boies that Dia less than 50mm from
           coming into shell. And protect parts of person, which is large
           area (for example hand), from touching the electriferous or
           working elements inside of the shell by accident. It can't
           prevent from approaching the machine on purpose.
          2

           Protected against
           solid bodies whose
           Dia. not less than
           12.5mm
           It can protect against the solid bodies whose Dia. is more than
           12mm and length is less than 80mm from coming into shell, and
           prevent the fingers from  touching the electriferous or working
           elements inside of the shell.
          3

           Protected against 
           solid bodies whose
           Dia. not less than
           2.5mm
           It can protect against the solid bodies that Dia is more than
           2.5mm from coming into shell, and prevent tools and metal lines
           that the thickness or dia. are more than 2.5mm from touching the
           electriferous or working elements inside of the shell.
          4

           Protected solid bodies
           whose Dia. not
           less than 1mm
           It can protect against the solid bodies that Dia or thickness
           are  more than 1mm from coming into shell, and prevent tools
           and metal lines that the thickness or dia.are more than 1mm
           from touching the electriferous or working
           elements inside of the shell.
          5

           Protected against dust
           Can't downright avoid dust coming into shell, but the inlet dust can't  affect the machine working 
          6

           Completely protected against dust

           Without dirt coming into the shell

          ??1 2 ??

              
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