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IP Rating Chart (IEC 60529)
IP rating chart explaining the two digits of the ingress protection code and where common ratings are used in plants.
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First digit: protection against solids
| Digit | Protection | Access probe |
|---|---|---|
| 0 | No protection | No protection |
| 1 | Objects over 50 mm (back of hand) | Large surfaces only |
| 2 | Objects over 12.5 mm (finger) | Finger |
| 3 | Objects over 2.5 mm (tools, thick wires) | Tool |
| 4 | Objects over 1.0 mm (most wires, screws) | Wire |
| 5 | Dust protected (limited ingress, no harmful deposit) | Wire |
| 6 | Dust tight (no ingress of dust) | Wire |
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Second digit: protection against water
| Digit | Protection | Test condition |
|---|---|---|
| 0 | No protection | |
| 1 | Vertically dripping water | 1 mm/min for 10 min |
| 2 | Dripping water with enclosure tilted 15° | 3 mm/min for 10 min |
| 3 | Spraying water up to 60° from vertical | 10 L/min, 5 min |
| 4 | Splashing water from any direction | 10 L/min, 5 min |
| 5 | Water jets from any direction (6.3 mm nozzle) | 12.5 L/min, 3 m, 3 min |
| 6 | Powerful water jets (12.5 mm nozzle) | 100 L/min, 3 m, 3 min |
| 7 | Temporary immersion | Up to 1 m for 30 min |
| 8 | Continuous immersion | Beyond 1 m, conditions agreed with maker |
| 9 | High pressure, high temperature jets | 80 °C water, 80 to 100 bar, close range |
Common IP ratings
| Rating | Meaning | Typical use |
|---|---|---|
| IP20 | Finger safe, no water protection | Indoor control panels, DIN rail devices |
| IP54 | Dust protected, splashing water | Indoor industrial, sheltered outdoor |
| IP55 | Dust protected, water jets | Motors, outdoor junction boxes |
| IP65 | Dust tight, water jets | Field instruments, washdown areas |
| IP66 | Dust tight, powerful jets | Outdoor transmitters, offshore |
| IP67 | Dust tight, immersion to 1 m | Sensors in pits, flooded areas |
| IP68 | Dust tight, continuous immersion | Submersible level probes |
| IP69K | Dust tight, high pressure steam cleaning | Food and beverage hygienic areas (ISO 20653) |
About this Table
IP rating chart explaining the two digits of the ingress protection code and where common ratings are used in plants.
Basis: IEC 60529 Degrees of protection provided by enclosures (IP Code). IP69K is defined in ISO 20653 for road vehicles and widely used in food plants.
How to use
- Read the first digit for dust and solids.
- Read the second digit for water.
- An X means not tested for that part, for example IPX7.
Notes
- A higher second digit is not always better: IPX7 immersion does not prove resistance to jets (IPX5, IPX6).
- IP ratings do not cover corrosion, ice or hazardous areas.
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Frequently Asked Questions
What does IP65 mean?
Dust tight and protected against water jets from any direction.
Is IP67 better than IP66?
Not always. IP67 is tested for immersion; IP66 for powerful jets. Many instruments carry both.
What is IP68?
Continuous immersion under conditions stated by the maker, beyond 1 m.
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