Updated at: 21-07-2022 - By: Lucas

If your car’s battery is dead, you can use jumper wires to connect it to the battery of another vehicle and get it going again. In some cases, a short circuit can be so intense that the jumper cables are melted before the circuit is completed. Too much heat and melting of these cables can be harmful and alarming.

But why do the jumper cables melt?

Using the improper battery terminal to connect the jumper cables can cause them to melt. Using a reversed or crossed jumper cable could cause excessive heat to build up on the wires, resulting in the cable’s insulation being melted.

The melting of the cables might also be caused by poor connections between the two sets of batteries. The increased resistance to electric flow from one terminal set to the next might cause the wires to melt if they are not tightly linked or if the cables used are of poor quality. Misaligned or faulty cable connections are the most prevalent cause of jumper cable melting, although there are others.

The most prevalent causes of melted jumper wires will now be discussed in greater detail.

1. Poor or low-quality jumper cables

Jumper Cables Melting

You may easily jump-start an automobile by connecting it to a functional battery and following the precise technique. It’s possible that you could get into problems if you use subpar cable or fail to satisfy a certain level.

To be sure you’re utilizing high-quality wires, look for 0 gauge jumper cables at a reputed mechanic store. The finest performance comes at a high cost; this grade can cost up to $300.

The 4 to 6 gauge rating, on the other hand, is recommended for everyday drivers. Don’t compromise on quality to save money. If you choose a cheap cable in order to save money, you will surely have an issue with the wires melting.

2. Reversed or crossed jumper cables( misaligned connection)

With the cables crossed, your car’s battery could explode. When jumper cables are reversed or crossed, they might melt. Jump-starting your car can be dangerous, so be careful. Avoid reversing or crossing them. It’s possible that doing so will cause them to melt, which could be harmful to you or your vehicle.

Inverted polarity will result if the connections are connected incorrectly. This means that the current will go the other way through the dead battery. Due to the reversed current, the clamps and cables will begin to overheat. Make sure the cable clamps are linked to the battery’s matching terminals when connecting the cables.

3. Low snug

When the battery and the jumper wires are connected, loose connections surrounding the terminals can occur. A greater amount of electrical current flows via the jumper cables when the batteries are jump starting. Overheating will occur if the cable connection is slack because of the extended electrical current path.

By making sure the jumper wires are securely fastened to battery terminals, you can avoid these potentially dangerous consequences. To prevent damage to your jumper wires, choose high-quality clamps that can hold the battery terminals firmly.

4. Jumper cables are damaged.

Jumper Cables Melting-3

Copper wires might be damaged if you don’t take care of your jumper cables. The cables might split and crack if they are subjected to excessive heat while being stored. Insulation melts and copper lines spit when exposed to high temperatures. The jumper cable can get too hot if it’s connected to a split copper line that can’t handle a lot of current.

5. Cheap, Improper, jumper cable material

The type of material utilized in the jumper cable can cause it to melt. Cheap aluminum is typically used by cable manufacturers in order to reduce production costs and increase sales. The person who will bear the brunt of this is the end user. These cables have a poor current connection and are prone to melting at a rapid rate. Copper and aluminum can be used in tandem to avoid such problems. Consumers and manufacturers alike benefit from the high performance and low cost of these cables.

Aluminum cables should be avoided at all costs because of their propensity to melt so quickly. In addition to melting, these wires may not make good contact, preventing them from transferring any electricity. To avoid melting, thicker metal wires should be used instead of thinner metal wires. Invest in high-quality copper restart cables that won’t melt under any circumstances.

What is the price of a good set of jumper cables?

Jumper cables can cost anything from $50 to $200. This way, you can rule out any issues with the jumper cables’ substance. A wide variety of products are available; it is up to you to select the one that is most appropriate for your automobile.


Preventative care is always preferable to curative treatment. Before your cables start melting, take the appropriate safeguards.