What Causes Neutral Wire Melting and How to Fix It

Neutral wires are an essential component of electrical circuits, acting as the return path for electrical current to flow back to the source.

Unlike the hot wires, which carry the electrical current to the appliance or device, neutral wires are typically connected to ground and have a lower voltage than the hot wires.

However, despite their lower voltage, neutral wires can still experience damage or melting, which can lead to significant electrical issues.

Potential Causes of Neutral Wire Melting

There are several potential causes of neutral wire melting, ranging from overloading to poor electrical connections to faulty appliances.

In many cases, neutral wire melting is a symptom of an underlying electrical problem that needs to be addressed to prevent further damage or safety hazards.


One of the most common causes of neutral wire melting is overloading. When too much electrical current flows through a circuit, the wires can overheat and melt, including the neutral wire.

This often occurs when there are too many appliances or devices connected to a single circuit or when a device draws more power than the circuit can handle.

Overloading can be especially problematic if it goes unnoticed, as it can cause significant damage to the electrical system and potentially lead to fires or other safety hazards.

Poor Electrical Connections

Another potential cause of neutral wire melting is poor electrical connections.

Over time, electrical connections can become loose or corroded, leading to resistance and overheating in the wires.

This can cause the neutral wire to melt, as well as create other electrical issues such as voltage fluctuations or power surges.

It’s important to periodically check electrical connections and tighten any that are loose or corroded to prevent this type of damage.

Faulty or Damaged Appliances

Finally, faulty or damaged appliances can also cause neutral wire melting.

If an appliance has a short circuit or other electrical issue, it can cause excess current to flow through the neutral wire, leading to overheating and melting.

Additionally, if an appliance is old or worn out, it may draw more power than it should, which can also cause damage to the neutral wire.

Short circuit

a short circuit is a common cause of neutral wire melting. A short circuit occurs when a hot wire comes into contact with a neutral wire, creating a low-resistance pathway for the electrical current to flow.

This can cause a surge of current to flow through the wires, including the neutral wire, which can overload and melt the wire.

It is important to address any short circuits promptly to prevent damage to your electrical system and potential hazards such as fires.


corrosion is one of the causes of neutral wire melting. Over time, exposure to moisture and other environmental factors can cause the metal of electrical wires to weaken and corrode.

This can result in the wires becoming more brittle and prone to breaking, as well as causing resistance and heat buildup.

In the case of the neutral wire, corrosion can cause it to weaken and overheat, potentially leading to melting.

It is important to regularly inspect and maintain electrical connections, especially in environments with high humidity or salt air, to prevent corrosion from occurring.

Poor quality or damaged wiring

Poor quality or damaged wiring is another cause of neutral wire melting. When electrical wires are of low quality or have been damaged, they can become more susceptible to overheating and melting.

This can be caused by a variety of factors, including inadequate insulation, incorrect sizing, or exposure to corrosive substances.

If the wiring is of low quality, it may not be able to handle the electrical load required, leading to overheating and melting of the wires.

Additionally, damaged wiring can cause resistance in the circuit, leading to heat buildup and ultimately melting of the wires.

To prevent neutral wire melting caused by poor quality or damaged wiring, it is important to use high-quality wiring that is rated for the intended use and installed correctly.

It is also important to regularly inspect wiring for signs of wear or damage and replace as necessary.

Read my comprehensive article wire insulation damage causes, effects and solutions.

Identifying the Signs of Neutral Wire Melting

To prevent further damage or safety hazards, it’s important to identify the signs of neutral wire melting early.

Some common signs include burning smells, flickering lights, warm electrical outlets, or tripped circuit breakers.

If you notice any of these signs, it’s important to take action immediately to prevent further damage.

Preventative Measures

There are several preventative measures you can take to protect your electrical system and prevent neutral wire melting.

These include avoiding overloading circuits, checking electrical connections regularly, using surge protectors, and replacing old or faulty appliances.

Additionally, it’s important to have your electrical system inspected regularly by a licensed electrician to identify any potential issues before they become major problems.

When to Call an Electrician for Neutral Wire Issues

If you suspect that your neutral wire is melting or experiencing damage, it’s important to seek professional help immediately.

Only a licensed electrician has the knowledge and experience to properly diagnose and repair electrical issues, including neutral wire damage.

Attempting to fix electrical issues on your own can be dangerous and may cause further damage to your electrical system.


In conclusion, neutral wire melting can be a serious electrical issue that requires immediate attention.

By understanding the potential causes of neutral wire melting and taking preventative measures to protect your electrical system, you can help prevent this issue from occurring.

It’s important to remember to never attempt to fix electrical issues on your own, and always seek professional help if you suspect an issue with your electrical system.

By keeping your electrical system safe and secure, you can enjoy peace of mind and avoid potential safety hazards.