Ingress protection... explained

 


 

First digit

 

The first digit indicates the level of protection that the enclosure provides against access to hazardous parts (e.g., electrical conductors, moving parts) and the ingress of solid foreign objects.

 

Level

Object size protected against

Effective against

0

No protection against contact and ingress of objects

1

>50 mm

Any large surface of the body, such as the back of a hand, but no protection against deliberate contact with a body part

2

>12.5 mm

Fingers or similar objects

3

>2.5 mm

Tools, thick wires, etc.

4

>1 mm

Most wires, screws, etc.

5

dust protected

Ingress of dust is not entirely prevented, but it must not enter in sufficient quantity to interfere with the satisfactory operation of the equipment; complete protection against contact

6

dust tight

No ingress of dust; complete protection against contact

 

 

 

Second digit

 

Protection of the equipment inside the enclosure against harmful ingress of water.

 

Level

Protected against

Details

0

not protected

1

dripping water

Dripping water (vertically falling drops) shall have no harmful effect.

2

dripping water when tilted up to 15

Vertically dripping water shall have no harmful effect when the enclosure is tilted at an angle up to 15 from its normal position.

3

spraying water

Water falling as a spray at any angle up to 60 from the vertical shall have no harmful effect.

4

splashing water

Water splashing against the enclosure from any direction shall have no harmful effect.

5

water jets

Water projected by a nozzle against enclosure from any direction shall have no harmful effects.

6

powerful water jets

Water projected in powerful jets against the enclosure from any direction shall have no harmful effects.

7

immersion up to 1 m

Ingress of water in harmful quantity shall not be possible when the enclosure is immersed in water under defined conditions of pressure and time (up to 1 m of submersion).

8

immersion beyond 1 m

The equipment is suitable for continuous immersion in water under conditions which shall be specified by the manufacturer.
NOTE: Normally, this will mean that the equipment is hermetically sealed. However, with certain types of equipment, it can mean that water can enter but only in such a manner that produces no harmful effects.

 

 

 

Additional letters

 

The standard defines additional letters that can be appended to classify only the level of protection against access to hazardous parts by persons:

 

Level

Protected against access to hazardous parts with

A

back of hand

B

finger

C

tool

D

wire

 

Further letters can be appended to provide additional information related to the protection of the device:

 

Letter

Meaning

H

high voltage device

M

device moving during water test

S

device standing still during water test

W

weather conditions

 

 

 

IP69K

 

German standard DIN 40050-9 extends the IEC 60529 rating system described above with an IP69K rating for high-pressure, high-temperature wash-down applications. Such enclosures must not only be dust tight (IP6X), but also able to withstand high-pressure and steam cleaning. The test specifies a spray nozzle that is fed with 80 C water at 810 mPa (80100 bar) and a flow rate of 1416 L/min. The nozzle is held 1015 cm from the tested device at angles of 0, 30, 60 and 90 for 30 s each. The test device sits on a turntable that rotates once every 12 s (5 rpm).

 

The IP69K test specification was initially developed for road vehicles, especially those that need regular intensive cleaning (dump trucks, cement mixers, etc), but also finds use in other areas (e.g., food industry).

 

 

NEMA enclosure ratings

 

Conversion chart for NEMA ratings to IP codes. 

 

NEMA rating

IP rating

1

IP20

2

IP22

3R

IP24

5

IP53

12, 12K, 13

IP54

3, 3S

IP55

4, 4X

IP66

6

IP67

6P

IP68

 

Please note - as the NEMA ratings include additional test requirements, the above comparison table can not be used to select the IP rating equivalent to the NEMA rated enclosure specifications.

 

 

Disclaimer:

 

The above information is offered only as guide in choosing a suitable product.  West Controls Ltd. accept no responsibility for the validity of the information above, or any work area assessment.  We will however ensure that any products offered by us meet the requirement of the application as specified

 

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