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Understanding IP Ratings: Dust and Water Protection
IP ratings appear on tools, lights, and equipment. They tell you how protected a device is against dust and water. Understanding them helps you choose the right tool for the conditions.
What IP Means
IP stands for Ingress Protection. The rating tells you what can get into the device.
The format is always "IP" followed by two numbers (e.g., IP54):
- First number = solid particle (dust) protection (0-6)
- Second number = liquid (water) protection (0-9)
First Number: Dust Protection
| Rating | Protection Level |
|---|---|
| 0 | No protection |
| 1 | Objects >50mm (e.g., hands) |
| 2 | Objects >12mm (e.g., fingers) |
| 3 | Objects >2.5mm (e.g., wires) |
| 4 | Objects >1mm (e.g., small wires) |
| 5 | Dust protected (some dust may enter, not enough to affect operation) |
| 6 | Dust tight (no dust entry) |
For workshop and construction use, IP5X or IP6X is important for dusty environments.
Second Number: Water Protection
| Rating | Protection Level |
|---|---|
| 0 | No protection |
| 1 | Vertical dripping water |
| 2 | Dripping water at 15° angle |
| 3 | Spraying water up to 60° |
| 4 | Splashing water from any direction |
| 5 | Water jets from any direction |
| 6 | Powerful water jets |
| 7 | Temporary submersion up to 1m |
| 8 | Continuous submersion beyond 1m |
| 9 | High-pressure, high-temperature water jets |
Common Ratings Explained
IP20
Basic protection against fingers. No water protection. Indoor use only, dry environments.
IP44
Protected against objects >1mm and splashing water. Suitable for outdoor use where it won't be submerged or jet-washed. Common for outdoor lights and extension leads.
IP54
Dust protected (not fully sealed) and splash resistant. Good for general outdoor use. Many outdoor power tools have this rating.
IP55
Dust protected and protected against water jets. Better for exposed outdoor use and light rain.
IP65
Dust tight and protected against water jets. Good choice for site lighting and outdoor equipment exposed to weather.
IP67
Dust tight and can handle temporary submersion. Common for quality outdoor and marine equipment.
IP68
Dust tight and suitable for continuous submersion. Used for underwater equipment.
Practical Applications
Power Tools
Standard power tools often have minimal IP rating. They're designed for normal workshop conditions. For site work in dust or rain, look for IP54 or better.
The DeWalt 18V XR range includes tools with better dust protection for site conditions.
Site Lighting
Outdoor site lights should be IP44 minimum. For exposed positions, IP65 is better. Check our site lighting range.
Extension Leads
Indoor leads don't need ratings. Outdoor use requires IP44 minimum for socket protection.
Phones and Devices
IP67 or IP68 smartphones can survive drops in puddles. Still don't deliberately submerge them.
What IP Ratings Don't Cover
- Impact resistance (that's IK ratings)
- Chemical resistance
- Corrosion resistance
- Long-term water exposure beyond test parameters
- Saltwater (usually more corrosive)
Making the Right Choice
For Indoor Workshop
Basic protection usually sufficient. IP20 tools work fine in dry, clean environments.
For Dusty Environments
IP5X or IP6X. The first number matters most here.
For Outdoor/Site Work
IP44 minimum. IP54 or IP55 for better protection.
For Exposed Outdoor Use
IP65 or better. Dust tight and protected against rain and pressure washing.
Remember
IP ratings are tested under specific conditions. Real-world abuse may exceed test parameters. Higher rating = better protection, but no rating means "waterproof forever."
Treat all equipment with care regardless of rating. Clean and dry tools after wet conditions. Check seals and gaskets periodically.
Browse our power tools and electrical range for rated equipment.