Korea Ever-Power · IP Protection Guide · IEC 60529

First digit “4”: protected against solid particles over 1 mm (prevents wires and small tools from contacting internal parts). Second digit “4”: protected against water splashing from any direction at up to 10 litres per minute flow rate. IP44 motors are suitable for indoor installation in clean to moderately dusty environments free from water jets or direct rainfall. They are not suitable for outdoor installation without additional housing protection.

First digit “5”: dust-protected (dust ingress limited so it does not interfere with satisfactory operation — not fully dust-tight). Second digit “4”: water splashing from any direction. IP54 is the most common IP rating for general-purpose industrial three-phase motors installed in typical factory environments. Korea Ever-Power Y2 series standard IP54 motors cover the vast majority of general industrial applications. IP54 is sufficient for most pump rooms, conveyor drives, fans, and general factory machine drives.

First digit “5”: dust-protected. Second digit “5”: protected against water jets from any direction at 12.5 litres per minute, 30 kPa (0.3 bar) pressure from a 6.3 mm nozzle. IP55 motors are suitable for outdoor installation exposed to rainfall, outdoor water spray, and periodic low-pressure hose washing. Korea Ever-Power YB2 explosion-proof motors are rated IP55 as standard, making them suitable for outdoor hazardous area installations exposed to rain.

First digit “5”: dust-protected. Second digit “6”: protected against powerful water jets at 100 litres per minute, 100 kPa (1 bar) from a 12.5 mm nozzle — approximately 3 to 4 times the water flow rate and pressure of the IP55 test. IP56 motors withstand the sustained water jet exposure from deck washing on marine vessels and heavy hose-down in quarry, mining, and civil engineering environments. IP56 is not common in general catalogue motor ranges; it is more often found as a special specification.

First digit “6”: dust-tight (zero dust ingress permitted). Second digit “5”: water jets from any direction at 12.5 litres per minute, 0.3 bar. IP65 is the minimum specification for motors in food processing washdown areas where low-pressure hose cleaning with water and dilute cleaning solutions is used. IP65 motors installed in food areas still require a stainless steel or epoxy-coated frame to resist chemical exposure — the IP65 rating only certifies water ingress protection, not corrosion resistance.

First digit “6”: dust-tight. Second digit “6”: powerful water jets at 100 litres per minute, 1 bar. IP66 provides significantly more water jet resistance than IP65, making it suitable for environments where sustained high-volume water flow is used for cleaning, such as abattoirs and fish processing plants where large volumes of water at medium pressure are used for flushing floors and equipment areas. IP66 with stainless steel frame is used where IP69K cost is not justified.

First digit “6”: dust-tight. Second digit “7”: temporary immersion to 1 metre depth for 30 minutes without harmful water ingress. IP67 motors are specified for equipment that may be temporarily submerged in flooding situations, wash-through installations (where water washes over the motor), or installations below grade where occasional flooding is possible. IP67 does NOT certify protection against high-pressure water jets — a motor rated IP67 may fail IP65 or IP66 jet tests because the seal system is designed for static pressure, not the dynamic impact of a directed jet.

First digit “6”: dust-tight. Second digit “8”: continuous immersion at depth specified by the manufacturer (commonly 3 to 10 metres) for extended periods. IP68 motors are used for submersible pump drives, under-water conveyor drives in water treatment, and permanently submerged stirrer drives. The test depth and duration are specified by the manufacturer and must be confirmed against the actual installation depth before specifying IP68. IP68 does NOT protect against high-pressure water jets.

IP69K is the highest ingress protection rating defined in IEC 60529 (supplemented by DIN 40050-9 and ISO 20653 for the specific test parameters). The “9K” suffix was originally defined for road vehicle enclosures where high-pressure hot steam cleaning is used — the same conditions as food processing CIP cleaning. The test conditions are:

Korea Ever-Power BXG series stainless steel motors are certified to IP69K. They are available from the stainless steel motor product section.

General-purpose three-phase induction motor. IP54 dust-protected, water splash from any direction. IE3 efficiency standard. All four pole configurations. The Y2 series covers the vast majority of general industrial and commercial motor applications.

Explosion-proof motor for Zone 1 and Zone 2 hazardous areas. IP55 enclosure, Ex d IIB T4 certification. Suitable for outdoor installation. The YB2 series is the standard choice for pump and compressor drives in chemical, oil and gas, and solvent processing plants. Full range in the explosion-proof motors section.

Brake motor with integral spring-applied electromagnetic brake. IP54 enclosure rating covers both motor and brake as a combined unit. Suitable for hoist, conveyor, and positioning applications in standard factory environments. Available from the brake motors section.

Full 316L stainless steel construction with IP69K certification. FDA-compliant silicone shaft seals, NSF H1 food-grade bearing grease, Ra ≤ 0.8 μm surface finish on all external surfaces. The only Korea Ever-Power motor rated for food processing CIP high-pressure hot water washdown. Full range in the stainless steel motors section.