15
Enclosure Ratings
IP - 6 6 G
Protection against harmful ingress of water
Protection against solid foreign objects
Protection Specification Code (International Protection) (IEC529)
Japan Electrical Manufacturers Association’s standards (JEM1030)
Protection against oil
Protection Against Solid Foreign Objects
Grade
Protection
Criteria
5
Dust protected
Limited ingress of dust permitted (no harmful deposit).
6
Dust-tight
Totally protected against ingress of dust.
Protection Against Harmful Ingress of Water
Grade
Protection
Criteria
Examination method
4
Water splash from all
directions
Protected against water
splashed from all directions;
limited ingress permitted.
Spray water from all directions for 10 minutes using the test
device shown below.
Flow per water spray hole:
0.07 l/min
5
Housing jets from all
directions
Protected against
low-pressure jets of water
from all directions; limited
ingress permitted.
Spray water from all directions for one minute per m
2
of
external surface area and for a total time of no less than 3
minutes using the test device shown below.
12.5
l
/min
2.5 to 3 m
Discharging nozzle dia.: 6.3
6
Strong hosing jets from all
directions
Protected against strong
jets of water, e.g. for use on
shipdecks; limited ingress
permitted.
Spray water from all directions for one minute per m
2
of
external surface area and for a total time of no less than 3
minutes using the test device shown below.
100
l
/min
2.5 to 3 m
Discharging nozzle dia.: 12.5
JEM Standards
Protection Against Oil
Grade
Protection
Criteria
Criteria
F
Oilproof
Protected against improper
operation due to oil drops or
spray from any direction.
No penetration of oil to the extent of interfering with proper
operation after dropping the specified cutting oil on a test device
for 48 hours at a rate of 0.5
l
per hour.
G
Oil resistant
Protected against
penetration of oil drops or
spray from any direction.
No penetration of oil after dropping the specified cutting oil on a
test device for 48 hours at a rate of 0.5
l
per hour.