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What is an IP66 waterproof rating?


When a product is given an IP66 rating, this means it has been tested and confirmed to meet Ingress Protection level 6 for both solid and liquid particles. 

IP ratings measure the effectiveness of enclosures at preventing ingress that could damage electrical components, which would create safety hazards and operational failures. 

The higher each number in an IP rating is, the higher the level of protection the product offers – which is important when choosing the right cable connectors for specific environmental conditions.

If you are wondering whether IP66 cable connectors would be the best fit for your application, here is a summary of what connectors with this rating are capable of.

What is an IP66 rating?

The first number after IP rates the level of protection against solids, with 0 offering no protection at all and 6 being dust-tight, preventing particles as small as dust from entering. 

This means that an IP66 cable connector would be completely dustproof and protected against all larger solid particles, making it suitable for use in most dry environments.

The second number rates the moisture ingress protection level, which is crucial for electrical equipment that can corrode or malfunction if water comes into contact with these components.

These ratings vary from 0, again with no protection whatsoever, up to 9 or 9K. In the case of IP66, cable connectors with this rating would be protected against sprays or pressurised jets of water from all directions and angles.

Is an IP66 connector waterproof?

While an IP66 rating does offer a satisfactory level of watertightness against splashes, sprays, or jets – typically in addition to a dust-tight seal – this is not technically waterproof.

An IP66 connector is generally suitable for use in various environments with potential water exposure, such as outdoor lighting or agricultural equipment, but they should not be immersed in water for any length of time.

The lowest IP rating that offers a limited level of protection against immersion in water is 7, while a rating of 8 can guarantee protection against more extensive immersion in certain conditions.

Full protection against water ingress while immersed would require the highest IP rating of 9 or 9K.

Choose your IP66 cable connector

Here at Northern Connectors, we supply a wide range of IP-rated cable connectors, so you are sure to find a product that meets the specifications required for your application.

Our selection includes cable connectors with an IP66 waterproof rating from world-renowned brands like HARTING, HUMMEL, and PMA – including rectangular connectors and cable glands.

Many of these products are available in IP68 or IP69K if you require a waterproof connector – if you are not sure whether an IP66 cable connector would be suitable, you can always contact us for further information and advice.

Working with clients from many different industries, and being approved suppliers of these brands for many years, we can apply our in-depth knowledge to assist you in selecting the right cable connectors for your needs.

Find out more

If you want to know more about connector solutions or need guidance with selecting a suitable solution for your application, Northern Connectors is here to help.

You can explore our website, call us on 01744 815001, or complete our online contact form and we will be in touch at the nearest opportunity.

Technical expertise is just a click away. For rapid service & personalised support, complete the following form or call 01744 815 001

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