5 Warning Signs Your Switchboard Needs an Upgrade

Brandon Caspersz • January 27, 2026

Today we use high-power air conditioners, electric vehicles, and many new electrical devices, but most homes still rely on old wiring systems. The switchboard is the first point that handles all this load, yet it is often ignored. This becomes a problem when the switchboard is from before 1990, since two of the older brands have been classified as unsafe, it’s clear that these panels aren’t simply old. Their design issues can cause them to fail to trip when a short circuit occurs.


The main question is how to know when your switchboard has reached its limit or when it needs to be replaced. This guide from Legacy Trade explains the 5 signs that show your switchboard is no longer safe and how you can avoid serious electrical risks.


5 Critical Signs Your Switchboard Is Unsafe

Electrical faults show clear signs before a switchboard fails. You do not need technical knowledge to notice them. These are the main signs to look for:


1. Crackling Sounds

If you hear buzzing or sizzling near the switchboard, it means there is arcing from a loose or damaged connection. This creates heat and can start a fire.


2. Fishy or Burning Smell

A fishy or plastic-like smell near the panel means older parts are heating up and starting to melt. This is an active overheating sign.


3. Flickering Lights and Burn Marks

If lights dim when an appliance starts, the board is struggling with load. Brown marks, black soot, or melted areas show past overheating.


4. Ceramic Fuses

Old ceramic fuses cannot handle modern electrical loads and offer very limited protection. Their presence alone means the system is outdated.


5. Zinsco or FPE Panels

If the panel label shows Zinsco or Federal Pacific Electric, the board is unsafe. These specific panels frequently fail to interrupt the current during electrical faults, presenting a substantial fire risk.


Why You Should Not Ignore These Warning Signs

Delaying a switchboard upgrade increases both safety and financial risk. Ignoring these signs does not only risk a blackout; it raises the chance of real damage.


Insurance May Reject Your Claim

In case of fire, the inspector may detect the presence of unauthorized electrical panel such as Zinsco or FPE or any kind of unapproved wiring which will lead the insurer to reject the claim. A major disadvantage due to a small upgrade cost would be the complete coverage loss for your house.


Damage to Electronics

Old boards were not designed for today’s appliances. Without proper surge protection and grounding, one spike can destroy TVs, computers, chargers, and other devices in seconds.


Lack of RCD Safety Protection

Older fuse boards protect the wiring but not the person. Modern panels include RCDs that cut power in milliseconds to prevent electric shock. Without them, you have no direct protection during a fault.


A Safe and Simple Switchboard Upgrade

In case wire inspection or sound detection seems complicated, or if you prefer the issue to be resolved stress-free, we have an easy-todo solution. Legacy Trade provides an uncomplicated, same-price Switchboard Upgrade Package that makes your house comply with the latest safety rules.

  • Switchboard upgraded to 2025 safety standards

  • Safety switches (RCBOs) installed on up to 5 circuits

  • Independent inspector checks and certifies the work

  • Lifetime warranty on circuit protection

  • Fixed price of $795 with no hidden costs


Conclusion

An outdated switchboard is not just an old piece of equipment. It affects safety, insurance, and the electrical appliance in your home. If you notice any warning signs or if your board is from before 1990, the safest choice is to upgrade it before a fault occurs.

Legacy Trade offers a complete service that includes licensed installation, installation of safety measures according to the latest standards, and an upgrade package that will make your home compliant with today's standards. A proper switchboard not only makes your family safe but also acts as a barrier to property damages while at the same time providing a steady power supply that is without any risk. If you desire a safe and durable setup, then it is wise of you to go for upgrading at this time.

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