EV Charging Cables Explained: Types, Lengths & How to Choose the Right Cable
Buying an EV charging cable sounds simple until you start seeing terms such as Type 2, 32A, 7kW, 22kW, single-phase, three-phase, tethered and untethered.
The good news is that you do not need to become an electrical engineer to choose one.
You mainly need to get a few things right: connector compatibility, charging capability, cable length and where you will use it.
For most modern UK electric cars using a socketed AC chargepoint, a Type 2 cable is the key starting point. UK government specifications for AC chargepoints reference BS EN 62196 Type 2 sockets, while AC charging commonly uses Mode 3 equipment. (GOV.UK)
This guide explains the different types of EV charging cables, what the numbers actually mean and the things worth checking before you buy one.
What Is an EV Charging Cable?
An EV charging cable connects your electric car to a compatible charging point so electricity can flow between the two.
That sounds obvious, but the cable you need depends on the car, chargepoint and type of charging involved.
Some chargepoints have the cable permanently attached. These are commonly called tethered chargepoints.
Others have a socket, meaning you bring your own cable. These are untethered chargepoints.
This guide focuses mainly on the removable cables used with AC charging points.
What Type of EV Charging Cable Do I Need?
For many modern UK and European electric cars, the starting point will be a Type 2 cable.
But connector type should always be checked against your specific vehicle and chargepoint rather than assumed.
There are two ends to consider:
|
What you need to check |
Why it matters |
|
Car connector |
Must match the vehicle's charging socket |
|
Chargepoint connector |
Must match the socket on the charger |
|
Current rating |
Determines how much current the cable can safely handle |
|
Charging phase |
Affects the maximum charging power possible |
|
Cable length |
Determines whether the cable comfortably reaches the car |
Older EVs and some vehicles can have different connector arrangements, while rapid DC charging uses different systems and generally has its cable attached to the charger.
The safest approach is to check the vehicle handbook or manufacturer's charging information before buying.
Type 1 vs Type 2 EV Charging Cables
Type 1 and Type 2 are different AC charging connector standards.
Type 2 is the more relevant connector for the majority of modern UK and European EVs.
Type 1 is associated with some older vehicles and models originating from markets where that connector was more common.
The important point is simple:
Do not buy a cable based only on the name of your car. Check the actual charging socket.
The UK government's EV charging market study notes that EVs use different connector types depending on charging technology, with Type 1 and Type 2 typically associated with slow or fast AC charging and CCS or CHAdeMO associated with rapid DC charging. (GOV.UK)
Type 2-to-Type 2 Charging Cables
A Type 2-to-Type 2 cable has a Type 2 connector at both ends.
This is the common configuration you'll encounter when using an untethered AC chargepoint with a modern UK EV.
One end connects to the chargepoint.
The other connects to the vehicle.
That makes compatibility relatively straightforward as long as both sides support the same connector and charging requirements.
How Does an EV Charging Cable Affect Charging Speed?
A charging cable does not magically make an EV charge faster.
The actual charging rate is limited by the combination of factors involved, including:
-
The vehicle's onboard AC charger
-
The chargepoint
-
The property's electrical supply
-
The cable's current and phase rating
-
Any load-management restrictions
For example, a cable capable of handling a higher charging rate does not mean the car will suddenly accept that rate.
A vehicle that can only accept a certain AC charging power will still be limited by the vehicle.
That is why choosing a cable should be about matching the system, rather than simply buying the biggest number available.
7kW vs 22kW EV Charging Cables
You will often see EV cables described as 7kW or 22kW.
These labels generally relate to the charging power the cable and connected equipment are designed to support.
A typical home AC charging setup in the UK is around 7kW, while higher charging rates can require three-phase equipment and a vehicle capable of accepting the additional power.
Government specifications distinguish standard AC charging up to 7kW from faster AC charging above 7kW, with three-phase systems used at higher power levels. (GOV.UK)
The important part
Do not choose a cable purely because it says 22kW.
Ask:
Can my car use it?
Can my chargepoint provide it?
Does my electrical setup support it?
A higher-rated cable may give you flexibility for compatible equipment, but it does not override the limits of the vehicle or charger.
For a deeper look at charging power, see 7.4kW vs 22kW EV Chargers: Which One Is Right for You?
How Long Should an EV Charging Cable Be?
Cable length is one of the most practical decisions you will make.
Too short and you may struggle to reach the charging port.
Too long and you have more cable to manage and store.
The right length depends on the physical relationship between the chargepoint and the car.
5m EV Charging Cable
A 5m cable can work well when the chargepoint is positioned close to where the car normally parks.
It is often a sensible option for a straightforward driveway or garage setup.
The downside is less flexibility if the car parks in a different position.
10m EV Charging Cable
A 10m cable provides considerably more reach.
It can be useful where the charger is positioned farther from the usual parking position or where different parking angles are possible.
15m EV Charging Cable
A 15m cable can make sense when the distance between charger and vehicle is substantial or when you want more freedom over where the car can park.
Cable management becomes more important at this length.
20m EV Charging Cable
A 20m cable provides maximum flexibility from the options above, but it is also a lot of cable to handle.
It is most useful when there is a genuine reach requirement rather than simply choosing the longest option because it is available.
Government guidance on chargepoint design also recognises the importance of cable length because sockets can be positioned differently across vehicles and cables need to reach comfortably. (GOV.UK)
How Do I Choose the Right Cable Length?
Do not simply measure the straight-line distance between the charger and car.
Think about the actual route the cable will take.
Check:
Where is the chargepoint mounted?
Where is the car's charging port?
Does the car normally park nose-in or rear-in?
Could another vehicle use the same space?
Will the cable need to go around anything?
A little extra reach can be useful, but buying an unnecessarily long cable can create its own storage and handling problems.
What Do 16A, 32A and Other Cable Ratings Mean?
You may also see charging cables labelled by current rating rather than charging power.
For example:
16A
32A
The amp rating indicates the amount of current the cable is designed to carry under its specified conditions.
You should not treat the biggest number as automatically better.
The current rating needs to match the charging system and the vehicle.
A correctly specified 32A cable may support a higher charging rate than a lower-rated cable in a compatible system, but the vehicle and chargepoint still determine what you actually receive.
What Is a Single-Phase or Three-Phase EV Cable?
Another specification you may encounter is the number of phases.
A typical UK home charging setup uses single-phase electricity.
Three-phase charging can support higher AC charging rates where the vehicle and electrical installation also support it.
This is particularly relevant when looking at higher-powered charging such as 11kW or 22kW.
You therefore need to consider the whole charging setup, not simply the cable label.
Tethered vs Untethered EV Charging
With a tethered charger, the cable is permanently attached to the chargepoint.
With an untethered charger, the chargepoint has a socket and you use a removable cable.
Each has advantages.
Tethered charging is convenient because the cable is always there.
Untethered charging can give you more flexibility because you can use a compatible cable and store it away when it is not needed.
For the full comparison, see:
Tethered vs Untethered EV Chargers: Which Is Right for You?
Keeping that detailed comparison on its own page also makes this guide easier to use: here, we explain the cable itself; the separate article deals with the charger format.
10 Things to Check Before Buying an EV Charging Cable
This is the part worth saving.
1. Check your vehicle connector
Find out exactly what connector your EV uses.
Do not rely on assumptions.
2. Check the chargepoint socket
The connector on the car is only half of the equation.
Your chargepoint needs to accept the other end of the cable.
3. Check the maximum AC charging rate
Know what your vehicle can actually accept.
There is little benefit in paying for a cable rating your system cannot use.
4. Check the current rating
Look at whether the cable is appropriately rated for the intended charging setup.
5. Check single-phase or three-phase compatibility
This becomes particularly important if you are considering higher-power AC charging.
6. Measure the required length
Think about the actual route between charger and vehicle rather than simply choosing a number at random.
7. Consider cable management
Longer cables give you reach, but they also need somewhere sensible to go when charging is finished.
8. Consider where you will use it
A cable used outdoors needs to be suitable for the environment in which it will be used.
9. Check the manufacturer and specifications
Buy from a reputable supplier and make sure the product specifications are clearly stated.
Electrical Safety First advises EV owners to buy charging cables from reputable retailers or directly from manufacturers and to regularly check cables for damage or wear. (Electrical Safety First)
10. Think about your future setup
Your car might change.
Your charger might change.
A cable that works for today's vehicle may not necessarily be the best long-term choice.
Choosing a suitable specification rather than the cheapest available option can make more sense over the life of the cable.
Are EV Charging Cables Universal?
No.
The right cable depends on your vehicle, chargepoint and charging setup.
Some modern EVs may use the same connector standard, but that does not mean every cable is automatically interchangeable for every charging situation.
You still need to check:
-
Connector type
-
Current rating
-
Charging phase
-
Maximum charging power
-
Cable length
-
Intended use
That is why it is better to match a cable to your actual setup than to assume all EV cables are the same.
Can You Use a Longer EV Charging Cable?
Yes, provided the cable is correctly specified for the charging system.
The main question is whether you actually need the extra length.
A longer cable can make parking easier and give you greater flexibility, especially where the charger cannot be positioned directly beside the vehicle.
But longer is not automatically better.
You still need sensible storage and cable management, particularly on longer driveways.
Do EV Charging Cables Need Special Care?
They do not require complicated maintenance, but they should be treated as electrical equipment rather than simply as a piece of rope connecting the car to the charger.
Check the cable periodically for:
-
Cuts
-
Cracks
-
Exposed conductors
-
Damaged plugs
-
Heat damage
-
Severe kinks or crushing
-
Signs of water ingress or other deterioration
Stop using a damaged cable and have it checked or replaced appropriately.
Electrical Safety First specifically recommends checking charging cables for wear and tear and replacing damaged products. (Electrical Safety First)
Can I Leave My EV Charging Cable Outside?
That depends on the cable and its intended use.
A cable designed for outdoor EV charging should have specifications appropriate to that environment.
You should also avoid situations where the cable can be repeatedly crushed, stretched or damaged by vehicles.
Cable management matters as much as cable length.
A tidy installation is not just about appearance; it also reduces unnecessary wear and trip hazards.
What About Public Charging Cables?
Public AC chargepoints can be either tethered or untethered.
With an untethered public AC point, you may need to carry your own compatible cable.
Rapid DC charging is different. These chargers generally provide their own attached charging cable because of the higher power involved.
That means your everyday cable choice is particularly relevant if you regularly use:
-
Home AC charging
-
Workplace AC charging
-
Public destination chargers
-
Untethered charging points
Which EV Charging Cable Should I Buy?
Start with four questions:
What connector does my car use?
This determines compatibility.
What charging power can my car accept?
This prevents you buying based on a rating your car cannot use.
What type of chargepoint will I use?
A home wallbox, public AC point and rapid DC charger can require different arrangements.
How much cable length do I actually need?
Measure the real charging distance and consider how the car normally parks.
Once those four questions are answered, the choice becomes much easier.
5m, 10m, 15m or 20m: Which Cable Length Is Best?
There is no universal winner.
|
Cable length |
Best suited to |
|
5m |
Charger close to the car and predictable parking |
|
10m |
More flexible driveway or charger positioning |
|
15m |
Longer reach or less predictable parking |
|
20m |
Maximum reach where a long run is genuinely required |
The right choice is the shortest length that comfortably reaches the vehicle in your normal parking position.
That gives you flexibility without leaving unnecessary cable to manage.
Final Thoughts
An EV charging cable is easy to overlook when you are focused on choosing the car or charger.
But get the cable wrong and a simple charging routine can become inconvenient very quickly.
The key is not to buy the biggest, longest or most expensive cable.
Choose one that is compatible with your vehicle, suitable for your chargepoint, correctly rated for the charging setup and long enough to reach comfortably.
For many modern UK EV owners, that means starting with a compatible Type 2 cable and then working through charging rating and length.
And once you know what you need, choosing the right cable becomes a much simpler decision.
FAQs
What is the most common EV charging cable in the UK?
Type 2 is the key AC connector standard for modern UK and European EV charging. Always check your vehicle and chargepoint specifications before buying.
What EV charging cable do I need?
You need a cable that matches your vehicle's connector, chargepoint socket, charging capability and required length.
Are EV charging cables universal?
No. Connector type, current rating, charging phase and charging capability can vary.
Is a 5m EV charging cable long enough?
It can be, particularly when the chargepoint is positioned close to the car. Measure the actual route from the charger to the vehicle's charging socket.
Is a 10m EV charging cable better than 5m?
Not necessarily. A 10m cable gives you more reach and flexibility, but a 5m cable may be easier to store when the charger and car are close together.
Do I need a 22kW EV charging cable?
Not necessarily. Your vehicle, chargepoint and electrical setup all need to support the higher charging rate before a 22kW setup provides any practical benefit.
Can I use an EV charging cable with a public charger?
Yes, where the public charger is an untethered AC chargepoint and your cable is compatible with both the charger and vehicle.