Section 8
Degree of Protection
Degree of Protection
Ingress protection degrees (IP-) are determined by the following tests. Be sure to check the sealing
capability under the actual operating environment and conditions before actual use.
IEC (International Electrotechnical Commission)
IEC 60529:2001
(A) First Digit: Degree of Protection from Solid Materials
(B) Second Digit: Degree of Protection Against Water
Degree Protection
0
No protection
1
Protects against penetration of any solid object such as a hand that is 50 mm or more in diameter.
2
Protects against penetration of any solid object, that is 12.5 mm or more in diameter. Even if finger
or other object 12 mm in diameter penetrates, it will not reach a hazardous part.
3
Protects against penetration of any solid object, such as a wire, that is 2.5 mm or more in
diameter.
4
Protects against penetration of any solid object, such as a wire, that is 1 mm or more in diameter.
5
Protects against penetration of dust of a quantity that may cause malfunction or obstruct the safe
operation of the product.
6
Protects against penetration of all dust.
Degree Protection Test method (with pure water)
0 No protection Not protected against water. No test
1 Protection against water
drops
Protects against vertical drops
of water towards the product.
Water is dropped vertically
towards the product from the
test machine for 10 min.
2 Protection against water
drop
Protects against drops of
water approaching at a
maximum angle of 15to the
left, right, back, and front from
vertical towards the product.
Water is dropped for 25 min
each (i.e., 10 min in total)
towards the product inclined
15 to the left, right, back,
and front from the test
machine.
3 Protection against
sprinkled water
Protects against sprinkled
water approaching at a
maximum angle of 60 from
vertical towards the product.
Water is sprinkled for 10 min
at a maximum angle of 60
to the left and right from
vertical from the test
machine.
50 mm dia.
12.5 mm dia.
200 mm
15°
0.07l/min
per hole