Electric Motor IP Ratings — Quick Reference
IP (Ingress Protection) ratings on electric motors are two digits: first digit = solid particle protection (0-6), second digit = liquid protection (0-9). IP55 is the most common industrial motor standard — dust protected, water jet resistant.
| IP Rating | Solid protection | Water protection | Typical use |
|---|---|---|---|
| IP23 | Tools >12.5mm | Water spray at 60° | Indoor, sheltered |
| IP44 | Solid objects >1mm | Water splashing any direction | General industrial |
| IP54 | Dust protected | Water splashing any direction | Dusty environments |
| IP55 | Dust protected | Low-pressure water jets | Most industrial motors |
| IP56 | Dust protected | Powerful water jets | Washdown environments |
| IP65 | Fully dust-tight | Water jets any direction | Outdoor, aggressive environments |
| IP66 | Fully dust-tight | Powerful water jets | Food/beverage, marine |
AIMS stocks TechTop motors in IP55 rating as standard. Select IP55 for general factory environments. Upgrade to IP65 or IP66 for food processing, chemical or outdoor applications. Higher IP ratings increase motor cost and weight.
People Also Ask — Electric Motor IP Ratings
Q: What IP rating do I need for an outdoor electric motor?
For outdoor, weather-exposed applications, a minimum of IP55 is recommended — this provides dust protection (first digit 5 = dust-tight in normal operation) and protection against water jets from any direction (second digit 5). For washdown environments or direct rain exposure, IP65 or IP66 is preferable. Check the motor nameplate and confirm it matches the installation environment.
Q: What is the difference between IP54 and IP55?
Both provide partial dust protection (digit 5 = no harmful dust ingress under normal operation). The difference is in water resistance: IP54 protects against water splashing from any direction; IP55 protects against sustained water jets from any direction. For most outdoor general-purpose motor installations in Australia, IP55 is the accepted minimum standard.
Q: Can an IP55 motor be used in a food processing washdown area?
IP55 provides jet-wash protection but is not specifically designed for high-pressure, high-temperature washdown. Food processing washdown areas typically require IP65 or IP66 (dust-tight plus high-pressure jet protection). Confirm with the motor manufacturer — some IP55 motors have additional sealing suited to food environments; others do not. Check Safe Food Australia guidelines for your specific application.
Q: What do the two digits in an IP rating mean?
The first digit rates protection against solid objects and dust (0 = no protection, 6 = dust-tight). The second digit rates protection against water ingress (0 = no protection, 8 = continuous submersion). A motor rated IP55 is rated 5 for dust (dust-tight under normal operation) and 5 for water (protected against jets from any direction).
