Operating Instruction
99910400 | 99910420
www.herthundbuss.com 8
EN
1. General
Overview of IP-Code components (extract)
The protection classes are indicated by an abbreviation which is comprised of the letters IP
(International Protection) and which always remain the same, followed by two code num-
bers which represent the degree of protection. The first code number represents the degree
of protection against contact and foreign bodies, and the second represents the degree of
protection against damage caused by water penetration.
First
Protection against
Protection against
Second
Protection against
number human contact
infiltration of solid objects
number
infiltration of water
0
Not protected
Not protected
0
Not protected
1
With back of hand
Object with Ø over 50 mm
1
Vertical drop
2
With finger
Object with Ø over 12.5 mm
2
Drop at 15° angle
3
With tools
Object with Ø over 2.5 mm
3
Spray water
4
With thin wire
Object with Ø over 1 mm
4
Splashed water
5
With thin wire
Dust-proof
4K
Splashed water,
at high pressure, only
6
Complete
Dust-tight
for road vehicles
5
Jet water
6
Heavy jet water
6K
Heavy jet water,
at high pressure
(flooding), only for
road vehicles
7
Temporary immersion
8
Long-term immersion
9K
At high pressure/jet spray
cleaning, only for
road vehicles
