You keep resetting the safety switch, the lights flicker when the kettle goes on, and you can smell something faintly burnt near a power point. Old wiring gives you warning signs before it fails, and knowing what to look for could save your home. If your place was built more than 30 or 40 years ago and still has its original wiring, it is worth understanding when rewiring stops being optional and starts being urgent.
Why old wiring becomes a fire risk
Electrical wiring does not last forever. The insulation around the cables breaks down over decades, especially in Melbourne roof spaces that bake through summer and cool through winter. Older homes were also never designed for the load a modern household puts on them. Air conditioners, dishwashers, multiple fridges, home offices, and a dozen chargers all draw power the original circuits were never sized for.
When wiring degrades or gets overloaded, it heats up. Heat inside a wall cavity or roof space is exactly how electrical fires start. That is why the warning signs below are worth taking seriously rather than living with.
1. Your home still has old rubber or fabric wiring
Homes wired before the 1970s often used rubber or cloth-insulated cabling. Over time that insulation dries out, cracks, and crumbles, leaving live conductors exposed inside your walls and roof. If you have never had the wiring checked and the house is that vintage, assume it needs a proper look. This is not something you can see from a light switch, so it takes an electrician getting into the roof space to assess.
2. Flickering or dimming lights
Lights that flicker or dim when an appliance kicks in usually point to loose connections or circuits struggling under load. One flickering globe is often just the globe. Lights dimming across the room, or throughout the house, when the oven or air conditioner starts is a wiring or switchboard problem worth investigating.
3. The safety switch keeps tripping
A safety switch that trips now and then is doing its job. One that trips constantly is telling you there is a fault somewhere, often deteriorating insulation letting current leak where it should not. If you are resetting it regularly, get it looked at rather than living around it. We cover the common causes in our guide to safety switches.
4. Discoloured or warm power points and switches
Brown scorch marks around a power point, a switch plate that feels warm, or a faint burning smell are all signs of heat where there should not be any. Heat means a loose or failing connection. Stop using that outlet and have it checked quickly, because this is one of the clearer signs a fault is developing behind the wall.
5. Not enough power points, so extension leads everywhere
If every room relies on double adaptors and power boards daisy-chained together, the house was wired for a different era. Beyond being inconvenient, overloading old circuits this way generates heat and stress on wiring that is already ageing. More power points on properly rated circuits is the safer fix.
6. Buzzing sounds or a burning smell
Electricity should be silent. A buzzing or crackling sound from a switch, outlet, or the switchboard means arcing, and a persistent burning smell with no obvious source is a red flag. Both warrant switching off the affected circuit and calling an electrician the same day.
7. An old ceramic-fuse switchboard
If your switchboard still uses old ceramic fuses with rewireable fuse wire, the wiring behind it is usually just as old. These boards have no safety switches and struggle with modern demand. A switchboard upgrade often goes hand in hand with rewiring, because updating one without the other only solves half the problem.
Does the whole house always need rewiring?
Not always. Sometimes only certain circuits have degraded, and a partial rewire targets just those. Other times the wiring is uniformly old and a full rewire is the sensible call. The only way to know is an inspection. An electrical safety inspection checks the wiring, switchboard, and circuits and tells you what actually needs doing, rather than guessing.
Older homes usually need new cabling run through the walls and roof, which takes planning around access. Newer homes with early-generation wiring might only need targeted work. Either way, a licensed electrician gives you a clear scope before anything starts.
When to call a licensed electrician
If you have spotted any of the warning signs above, do not wait for the wiring to fail on its own. Buzzing, burning smells, warm outlets, or a constantly tripping safety switch are reasons to act now, not later. For anything that looks or smells like it is getting hot, treat it as urgent and call an emergency electrician.
Melbourne Wide Electrical is licensed and insured, with a 5.0 Google rating from more than 600 reviews and a lifetime workmanship guarantee. We give you upfront pricing with no hidden fees, so you know where you stand before we start. Call us on 1300 635 294 for an honest assessment of your wiring.
