IP Ratings Explained: From IP20 to IP69 and Where Which Class is Required
The IP rating determines where a piece of equipment may be used — from living-room socket to high-pressure-washdown resistance in food production. This overview explains every digit and shows typical applications.
How the IP code is constructed
The two-digit code per DIN EN 60529 codes exactly what an enclosure protects against.
Structure IPxy
x = protection against touch and solids (0-6), y = protection against water (0-9). A replacement digit 'X' means 'not specified'.
Standards basis
DIN EN 60529 (IEC 60529) — internationally valid, used across industry, appliances and lighting.
Additional letters
An optional 'K' means high-pressure water jet (IP69K). 'H', 'M', 'S', 'W' indicate further properties.
First digit: solid particle protection
The first digit describes protection against touch and ingress of solid particles.
| Code | Protection | Example |
|---|---|---|
| 0 | No protection | Rare — internal components |
| 2 | Fingers ≥ 12.5 mm | Standard residential socket |
| 3 | Tools ≥ 2.5 mm | Industrial sockets |
| 4 | Wires ≥ 1 mm | Outdoor sockets with flap |
| 5 | Dust-protected (not complete protection) | Outdoor lights |
| 6 | Dust-tight | Industry, food production |
Second digit: water protection
The second digit describes protection against water ingress.
| Code | Protection | Example |
|---|---|---|
| 0 | No protection | — |
| 2 | Drip water ≤ 15° tilt | Bath sockets outside zones |
| 4 | Splashing water all directions | Outdoor lights, bath zone 2 |
| 5 | Water jets | Garden, carport |
| 6 | Powerful water jets | Ship, outdoor splash zone |
| 7 | Temporary submersion (1 m / 30 min) | Pool lighting |
| 8 | Permanent submersion | Well pump |
| 9 | High-pressure steam jet | Food production |
Which IP class for which location?
Living rooms
IP20 is standard for sockets and lights. Entirely sufficient since no splash risk.
Bath
Zone 0: IP67, Zone 1: IP65, Zone 2: IP44. Outside zones: IP20 acceptable.
Outdoor (garden, terrace)
At least IP44 for outdoor sockets. With direct weathering, IP54 or higher.
Garden lighting
Flush mounted or in soil: IP67. Wall lights: IP44. Bollard lights: IP54.
Industry
Workshop: IP54. Food production: IP69K for high-pressure cleaning.
Swimming pool
Zone 0 (in pool): IP68 / SELV 12 V. Zone 1 (2 m around): IP65.
Tips for IP codes in practice
Higher IP isn't 'free'
IP65 sockets are bulkier and more expensive. Choose only as high as needed — not out of over-caution.
Installation matters
An IP65 socket installed with the flap open is effectively IP20. Installation and care are part of the protection.
IP44 in bath zone 2 is enough
Many planners oversize. In bath zone 2, IP44 suffices. IP67 is only needed for zone 0 (e.g. inside the tub).
Conclusion: IP code is detail work with big effect
Anyone who really understands IP codes can choose precisely — and save money without sacrificing protection. Rule of thumb: check carefully rather than going high by default.
💡 Tip: Note the required IP class directly in the plan for every socket and luminaire — saves callbacks when ordering.
IP requirements right in the plan
myElectricPlan knows the IP requirements for every room type and suggests matching components — from residential socket to in-ground garden light.
Plan IP-compliant now