How to Know If Your Home’s Wiring Is Too Old for Today’s Appliances

A practical guide for Brisbane homeowners on how to identify outdated wiring, and the warning signs that your home can’t safely handle today’s appliances and electrical loads.
Most Brisbane homes built before the early 2000s weren’t designed for the electrical demands we have now.
Back then, there were no:
✔ big air conditioners
✔ induction cooktops
✔ home offices
✔ multiple TVs
✔ dishwashers
✔ high-wattage appliances
✔ EV chargers
✔ solar systems
Today, the average home uses 3× more power, but many houses still have wiring from the 70s, 80s, or 90s.
Old wiring doesn’t just limit performance; it becomes a major fire and safety hazard.
Here’s how to know if your home’s wiring is too old for modern appliances.
1. Your Home Was Built Before 1995
If your home predates the mid-90s, there’s a high chance it still contains:
VIR (rubber) wiring
Cloth-insulated wiring
Early PVC that becomes brittle
Aluminium wiring
Non-earthed circuits
These wiring types deteriorate over time, especially in Brisbane’s heat and humidity.
If your home is 30+ years old, you should assume your wiring needs inspection.
2. Lights Flicker or Dim When Appliances Turn On
When you turn on a:
✔ kettle
✔ heater
✔ aircon
✔ microwave
…and the lights flicker, it means the circuits are struggling.
This usually happens when:
old wiring can’t carry modern loads
connections are loose
cables are overheating
It’s one of the clearest signs wiring is outdated.
3. Warm Power Points or Switches
If outlets or switches feel warm, buzz, or vibrate, it means:
connections are loose
wiring is overheating
the circuit is overloaded
Heat is the first stage before burning, and wiring damage behind the wall.
4. You Still Have Ceramic Fuses or an Old Switchboard
Ceramic fuses = outdated wiring 100% of the time.
Your switchboard tells the story:
If it’s old, your wiring is old.
If it has fuses, your wiring is unsafe.
If there are no RCDs, your wiring is non-compliant.
Modern wiring requires modern protection. If you lack one, you likely lack both.
5. Burning Smells, “Hot” Odors or Discolouration
A burning smell coming from:
outlets
walls
switchboard
ceilings
…means wiring insulation is breaking down.
Discoloured outlets or scorch marks are also strong indicators.
This is considered a high-risk fire hazard.
6. Frequent Tripping or “Overload” Issues
If your safety switch trips regularly, the wiring may be:
✔ too small for the load
✔ damaged
✔ overheating
✔ compromised internally
Old wiring was never designed for:
multiple ACs
dryers
double-storey setups
large fridges
gaming setups
home theatre systems
Your wiring simply can’t keep up.
7. You See Old Cable Types in the Roof or Under the House
Look for:
brittle black insulation
flaky rubber sheathing
cloth wrapping
twisted aluminium conductors
These cable types are now considered unsafe and require replacement.
(If you’re unsure- DO NOT touch wiring. Just visually check.)
8. Shocks or Tingling When Touching Appliances
If you feel any shock, tingle, zap, or metallic vibration when touching:
taps
appliances
metal surfaces
It’s a sign of:
broken earth connections
deteriorated wiring
live leakage
This is extremely dangerous and must be inspected immediately.
9. You Rely on Extension Leads Everywhere
If you’re using:
power boards
double adapters
long extension cords
multi-plug extensions
It’s because your home wasn’t wired for modern power needs.
This creates heat and overload; especially during Brisbane summers.
10. Your Appliances Struggle to Run at the Same Time
Old wiring cannot handle simultaneous loads.
If using two appliances causes:
✔ lights dimming
✔ breakers tripping
✔ flickering
✔ buzzing noises
It’s wiring related, not appliance related.
When Should You Consider a Full or Partial Rewire?
A rewire is recommended when:
✔ wiring is 30+ years old
✔ your switchboard is outdated
✔ you’re adding big loads (AC, kitchen, EV charger)
✔ your home has rubber/cloth/aluminium wiring
✔ there are frequent trips or smells
✔ you’re renovating or extending
✔ you’re selling or buying a home
A rewire dramatically increases safety and property value.
Old Wiring Is a Hidden Danger, Until It Fails
Brisbane homes are often pushed to their electrical limits.
Old wiring can lead to:
electrical fires
shocks
appliance damage
failed insurance claims
expensive emergency repairs
An inspection today can prevent thousands in damage later.
👉 Need a wiring inspection or upgrade in Brisbane?
Call Exclusive Electrical & Air for fast, safe, licensed service.
Your home’s safety starts now.