What Does IP Rating Mean for EV Equipment?

An IP rating (Ingress Protection) is a two-digit code that tells you how well a piece of equipment resists solid objects and water. The first digit covers protection against solids like dust, and the second covers protection against water, from dripping to jets. For EV equipment such as connectors and wallboxes, a higher second digit generally means better resistance to rain. The important thing to understand is the system itself, so you can read a product's own stated rating rather than assume one. Always check the specific figure in a product's listing, and if you are choosing a cable, our Type 2 cables and their listings are the place to confirm the details.

At a glance: how to read an IP rating

What do the two digits in an IP rating mean?

The two digits describe two separate things. The first digit, from 0 to 6, rates protection against solid objects and dust, where 6 means the enclosure is fully dust tight. The second digit, from 0 to 9, rates protection against water, from no protection up to protection against powerful jets and immersion. So a rating like IP65 means fully dust tight (6) and protected against water jets (5). Reading the two digits separately is the key skill: you can tell at a glance how a product handles dust and how it handles water.

What does the second digit tell you about water?

The second digit is the one most people care about for outdoor EV use, because it describes water resistance. Roughly speaking, the scale runs from protection against dripping water at the low end, up through spraying and splashing in the middle, to low and high pressure jets and then immersion at the top. A common band for outdoor electrical equipment is protection against splashing or jets from any direction. A higher number means the item copes with more forceful or sustained water. It is a general guide to how the product should behave in rain, not a promise for every situation.

What does the X mean, as in IPX4?

The X is a placeholder used when one of the two aspects has not been formally rated or stated. For example, IPX4 means the water protection has been tested to level 4, but the solids or dust protection has not been separately specified. It does not mean there is zero protection against solids; it simply means that figure is not given. You will see this on products where only the water rating is quoted. When you see an X, treat it as "not specified" for that aspect and rely on the digit that is stated.

Do you need a high IP rating for home charging?

For typical home charging you do not need an extreme rating, but sensible outdoor resistance is reassuring. A few points help you judge:

• Wallboxes and connectors made for outdoor use are built to cope with UK rain in normal conditions.
• A higher second digit signals better resistance to heavier or more forceful water.
• The rating describes the equipment when properly installed and connected, not a connector left lying in a puddle.
• Keep connector ends clean, dry and off the ground when not in use, whatever the rating.

The rating is a useful benchmark, but good handling and storage matter just as much.

Should you trust IP ratings for EV connectors?

You should treat a stated IP rating as a helpful, standardised benchmark rather than a guarantee for every scenario. The code is defined by a recognised international standard, so it is comparable across products, which is exactly why it is useful. That said, real-world performance depends on correct installation, a properly mated connection and sensible use. A connector is designed to resist water when plugged in and locked, but you should still avoid submerging connector ends or leaving them exposed to standing water. Read the specific rating a manufacturer states in the product listing, and do not assume a figure that is not written down.

Frequently asked questions

What does IP mean in an IP rating?

IP stands for Ingress Protection. It is a standardised two-digit code showing how well an enclosure resists the ingress of solids and water. The first digit covers solids and dust, and the second covers water. It lets you compare how different products cope with dust and moisture using a consistent, recognised scale.

Is a higher IP rating always better?

A higher rating means greater resistance to dust or water, so in that sense it is more protective. Whether you need the highest rating depends on use. For outdoor EV equipment, solid resistance to rain is sensible, but the most extreme figures are aimed at harsher conditions. Match the rating to how and where the item is used.

What is the difference between IP65 and IPX4?

IP65 states both aspects: fully dust tight (6) and protected against water jets (5). IPX4 states only the water aspect (protection against splashing) and leaves the solids figure unspecified, shown by the X. IP65 therefore gives you more information and, on the water side, a higher level of protection than IPX4.

Does an IP rating mean an item is waterproof?

Not necessarily. IP ratings describe resistance to water up to a defined level, not blanket "waterproofing". Only the very highest second digits cover immersion, and even then within limits. For most outdoor EV equipment, the rating indicates resistance to rain and splashing when properly connected, not that you can submerge it.

How do I find the IP rating of my EV equipment?

Check the product's own listing, packaging, manual or the label on the unit. Manufacturers state the IP rating there. Do not assume a rating that is not written down. If a rating is not published for a product, treat it as unspecified and use the item with appropriate care, keeping connectors clean, dry and off the ground.

Does the IP rating cover the whole cable?

An IP rating usually applies to a specific part, often the connector or an enclosure, rather than describing every element identically. Read the listing to see what the stated rating refers to. Regardless of the figure, sensible handling matters: keep connector ends clean and dry, avoid standing water, and store the cable somewhere protected when not in use.

In short: learn to read the two digits, then check the specific figure a manufacturer states rather than assuming one. For related reading, see our guide on EV cable weatherproofing explained and our answer to whether EV charging in the rain is safe. When you are ready to choose a lead, our Type 2 charging cables list the relevant details on each product page.