IP rating chart & definitions

IP rating, (otherwise known as “Ingress Protection” rating or “International Protection” rating) defines the sealing effectiveness of electrical enclosures against foreign particles like accidental contact, dust, moisture, liquids, etc. IP ratings are defined in international standard EN 60529 (British BS EN 60529:1992, European IEC 60509: 1989). IP ratings provide information about whether a device is capable of resisting dust or liquid intrusions and to what degree. Figure 1 shows the structure of an IP rating.

IP rating

Figure 1: IP rating

Table of Contents

First digit

The first digit in the IP rating denotes the degree of protection the enclosure provides against solid foreign objects like dust, accidental contact by hands, fingers, tools, wires, etc. The corresponding description of the digits are explained below:

First digit: Solid protection description:
0 (X) No protection
1 Protection against solid particle of diameter greater than 50mm
2 Protection against solid particles with diameter 12.5mm or more
3 Protection against solid particles with diameter 2.5mm or more
4 Protection against solid particles with diameter 1mm or more
5 Protection against dust particles
6 Dust tight; Full protection

Second digit

The second digit in the IP rating defines the degree of protection against liquid intrusions. The following is a brief description of the corresponding digits.

Second digit: Liquid or moisture protection description:
0 No protection
1 Protection against vertically dripping water
2 Protection against dripping water when the enclosure is tilted up to 15° angle
3 Protection against spraying water up to angle of 60° from vertical
4 Protection against water splashing from any direction
5 Protection against directed water jets of low pressure (6.3mm) from any angle
6 Protection against directed water jets of high pressure (12.5mm) from any angle
7 Protection against full immersion up to the depth of 1m for 30 minutes
8 Protection against immersion up to greater depths and higher pressure
9 (K) Protection against directed water jets of high temperature and pressure, wash downs or steam cleaning procedures

IPX rating

“X” seen in the IP ratings simply means that the value for the number is missing. The “X” can simply be replaced with a zero considering no ingress protection rating has been provided. For example, IPX4 can simply mean that the enclosure provides no protection from ingress of solid particles but provides protection against water splashing from any direction.

IPK rating

“K” as seen in some IP ratings mean that the enclosure must provide protection against ingress of directed water jets of high temperature and pressure. For example, IP69K ratings are typically used in wash down environments like car wash, food and beverage application and other steam cleaning procedures.

IP Rating Chart

Following is a quick reference chart to help you decide on the IP rating enclosure of your requirement.

No liquid protection Protection against vertically dripping water Protection against dripping water when the enclosure is tilted up to 15° Protection against spraying water up to 60° from vertical Protection against water splashing from any direction Protection against directed water jets of low pressure (6.3 mm) from any angle Protection against directed water jets of high pressure (12.5 mm) from any angle Protection against full immersion up to the depth of 1 m Protection against full immersion up to greater depths and higher pressure Protection against directed water jets of high temperature and pressure
No solid object protection IP00 IP01 IP02 IP03 IP04 IP05 IP06 IP07 IP08 IP09
Protection against solid particle of diameter greater than 50 mm IP10 IP11 IP12 IP13 IP14 IP15 IP16 IP17 IP18 IP19
Protection against solid particle of diameter greater than 12.5 mm IP20 IP21 IP22 IP23 IP24 IP25 IP26 IP27 IP28 IP29
Protection against solid particle of diameter greater than 2.5 mm IP30 IP31 IP32 IP33 IP34 IP35 IP36 IP37 IP38 IP39
Protection against solid particle of diameter greater than 1 mm IP40 IP41 IP42 IP43 IP44 IP45 IP46 IP47 IP48 IP49
Protection against dust particle IP50 IP51 IP52 IP53 IP54 IP55 IP56 IP57 IP58 IP59
Full dust protection IP60 IP61 IP62 IP63 IP64 IP65 IP66 IP67 IP68 IP69

Additional enclosure

Sometimes, the valves or components you use may be subjected to harsh or demanding industrial processes or different environments. In such case, the existing IP rating enclosure may not be enough to provide the desired protection. Additional enclosure around the valve or component is a good way of upgrading the protection level against the ingress of particles. These additional enclosures must be of suitable IP rating for additional protection and enhanced performance.

Frequently asked questions

What IP rating is waterproof?

Typically, the enclosures with ratings IP65, 66 and 67 are considered IP waterproof ratings. But the term “waterproof “is only applicable under certain considerations for each of these IP ratings.

  • IP65 rating means that the enclosure can only provide protection against low pressure (6.3mm) water jets. For testing IP65 enclosures, it should be projected to 12.5 liters of water volume per minute for at least 15 minutes with 30 kPa pressure at distance of 3m. Figure 2 is an example of IP65 rating enclosure.
  • IP66 rated enclosure provide protection against high pressure (12.5mm) water jets. The testing procedures include the enclosure being subjected to 100 liters per minutes of water volume with pressure of 100 kPa at the distance of 3m for at least 3 minutes.
  • IP67 rating means, the enclosure provides protection against immersion up to 1m. The test method for such enclosures includes immersion at the depth of at least 1m for 30 minutes or more. The immersion depth is measured from the bottom of the object and should be at least 15 cm from the top of the object.
IP65 - DIN - A connector for solenoid valves

Figure 2: IP65 - DIN - A connector for solenoid valves

Is IP68 submersible?

IP68 can be considered as total protection against dust ingress and immersion up to greater depths and higher pressure. However, the term “greater depths” and “higher pressure” can be vague. Therefore, the manufacturer and user must agree on the specification for IP68 depending upon their requirement and application. However, IP68 rating provides protection from immersion depths of at least 1 meter.

What is IP69K?

IP69K provides complete protection against ingress of dust and directed water jets of high temperature and pressure. It is mostly used in environments requiring heavy washdowns such as food and beverage processing industries where high temperature and pressure is important in cleaning procedures to maintain sanitation and hygiene. The IP69K is the highest protection IP rating.

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