Classes o protections against approaching to hazardous section and intrusions of extraneous solid matters and water, among functions of enclosure, are specified by the IP protection code according to the standard IEC60529 (equivalent to JIS C 0920) of the IP code indicates the class of protective structure of enclosue.

no. Protection of Device
Against Intrusion of
Extraneous Solid Matters
Protection of Human Body
Against Approaching
to Harzardous Section
0 No Protection No Protection
1
2
3
4
5
6
X Not Defined. Not Defined.
no. Protection of Device
Against Intrusion of water
0 No Protection
1
2
3
4
5
6
7
8
X Not Defined.
no. Protection of Human Body
Against Approaching to
Harzardous Section
A
B
C
D