6 vs 10mm Cable for Your EV Charger: Making the Right Choice

Electric vehicles have become increasingly popular in recent years, thanks to their eco-friendly nature and technological advancements. As more people make the switch to EVs, one important consideration is the charging infrastructure.

When setting up an EV charging station, the choice of cable thickness can significantly impact the charging process. This article delves into the debate of whether to use a 6mm or 10mm cable for your EV charger, offering insights to help you make an informed decision.

Understanding the Basics: Cable Thickness for EV Charging

Before we explore the specifics of 6mm and 10mm cables, it’s crucial to understand the role cable thickness plays in EV charging.

The cable acts as the conduit for electrical power to flow from the charging station to your vehicle’s battery. The thickness of the cable, typically measured in square millimeters (mm²), affects its current-carrying capacity and overall performance.

6mm Cable for EV Charger

A 6mm cable, often referred to as a 6mm² cable, is a relatively common choice for residential EV charging stations. Let’s examine the pros and cons of using a 6mm cable for your EV charger:


  1. Cost-Effective: 6mm cables are generally more affordable than their thicker counterparts, making them an attractive option for budget-conscious consumers.
  2. Suitable for Lower Power Levels: If you have a lower-powered EV or a charger that doesn’t support high-speed charging, a 6mm cable may be more than sufficient.
  3. Ease of Installation: The smaller cable size is more flexible and easier to install in various settings, especially for residential applications.


  1. Limited to Lower Power Levels: 6mm cables may not be suitable for high-power charging stations or fast-charging EVs, potentially leading to longer charging times.
  2. Risk of Overheating: Prolonged use at or near the cable’s maximum capacity could result in overheating, which may lead to reduced efficiency and safety concerns.

Important: EV battery replacement can cost $1000s. To avoid high-voltage battery replacement, there are some things you can do. Read this article to find out the 10 best ways to maximize EV battery life and save tons of money!

10mm Cable for EV Charger

A 10mm cable, is a thicker and more robust option for EV charging. Here are the advantages and disadvantages of using a 10mm cable for your EV charger:


  1. Higher Current-Carrying Capacity: A 10mm cable can handle more current, making it suitable for high-power charging stations and fast-charging EVs.
  2. Reduced Voltage Drop: Thicker cables minimize voltage drop, ensuring that your EV charges more efficiently, especially over longer distances.
  3. Enhanced Safety: The increased capacity of a 10mm cable reduces the risk of overheating and improves overall safety during charging.


  1. Higher Cost: 10mm cables are typically more expensive than their 6mm counterparts, which may affect the initial setup cost.
  2. Less Flexible: The increased cable thickness can make installation more challenging, particularly in tight or complex setups.

Also read: EV Battery in Hot Temperature: 5 Things to Know

Choosing the Right Cable: Considerations

Selecting the appropriate cable thickness for your EV charger depends on various factors, including your specific needs and budget. Here are some key considerations to help you make the right choice:

1. Power Requirements: Consider the power level of your EV and the charging station. If you own a high-power EV or plan to upgrade to one in the future, a 10mm cable may be a wiser choice to ensure efficient charging.

2. Cable Length: Longer cable runs may experience more voltage drop. If your charging station is a significant distance from your electrical panel, a 10mm cable can help maintain charging performance.

3. Future-Proofing: Think about your long-term plans. If you anticipate upgrading to a faster-charging EV model or expanding your charging infrastructure, investing in a 10mm cable may save you from costly upgrades later on.

4. Budget: Your budget plays a crucial role in your decision. While a 6mm cable is more affordable, a 10mm cable can offer better long-term performance and safety.

5. Installation: Evaluate the installation requirements. If your setup involves tight corners or complex routing, a more flexible 6mm cable might be easier to work with.


Choosing between a 6mm and a 10mm cable for your EV charger involves a careful analysis of your needs, budget, and long-term plans. Both cable options have their advantages and disadvantages, and the decision ultimately depends on what suits your specific situation.

To ensure safe and efficient EV charging, consult with a professional electrician who can provide expert guidance and perform the installation correctly.

In conclusion, whether you opt for a 6mm cable to keep costs down or go with a 10mm cable for enhanced performance and safety, the most critical aspect is to ensure that your charging station meets your EV’s power requirements while adhering to safety standards.

With the right cable in place, you can enjoy a seamless and reliable charging experience for your electric vehicle.