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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

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