INDICES
OF PROTECTION OF ELECTRICAL EQUIPMENT ENCLOSURES
First
number :
Protection against solid objects
Second
number :
Protection against liquids
IP
Tests
Definition
IP
Tests
Definition
0
No
Protection
0
No
Protection
1
Ø 50 mm
Protected
against solid objects of over 50 mm
( e.g. accidental hand contact )
1
Protected
against vertically dripping water
( condensation )
2
Ø 12 mm
Protected
against solid objects of over 12 mm
( e.g. finger )
2
Protected
against water dripping up to 150 from the vertical
3
Ø
2.5 mm
Protected
against solid objects of over 2.5 mm
( e.g. thin wire )
3
Protected
against rain falling at up to 600 fro the vertical
4
Ø
1 mm
Protected
against solid objects of over 1 mm
( e.g. thin wire )
4
Protected
against water splashes from all directions
5
Protected
against dust
( no deposits of harmful material)
5
Protected
against jets of water from directions
6
Totally
protected
against dust.
Does not involve
rotating machines
6
Protected
against jets of water comparable to heavy seas
7
Protected
against the effects of immersion to depths of between 0.15 and 1m.
8 ..m
Protected
against the effects of prolonged immersion at depth
Example :
IP 55 machine
IP : Index of protection. 5 : Machine protected against dust and accidental contact
Test results : no dust enters in harmful quantities;
no risk of direct contact with
rotating parts. 5 : Machine protected against jets of water from all directions
from hoses at 3 m
distance with a flow rate of 12.5
l/min at 0.3 bar.
Test result : no damage from water projected
on to the machine whilst in
operation.
