Short answer: Older Inner West terraces, cottages and Federation homes often have a mix of wiring from different decades: some original rubber-insulated or cloth-covered cable, ceramic fuses, lighting circuits with no earth, and later additions joined on. Look for ceramic fuses, no safety switches, black backing boards, brittle or cloth-covered cable in the roof space, warm switches, and flickering lights. The fix isn’t always a full rewire. Testing tells you which circuits are sound and which need replacing.
The Inner West has some of Sydney’s best-loved older housing: Victorian terraces in Newtown, Glebe and Balmain, workers’ cottages in Marrickville and Enmore, and Federation homes in Haberfield, Summer Hill and Ashfield. These homes weren’t built for electricity as we use it today, and most have been wired, rewired and added to several times since. Here’s what to look for, and how to plan a safe upgrade without wrecking the character you love.
What “old wiring” usually means in these homes
Rubber-insulated and cloth-covered cable
Before PVC-insulated cable became standard, homes were wired with rubber-insulated cable, often called VIR, sometimes with a cloth or braided outer covering. Rubber insulation hardens and cracks with age and heat, particularly in hot roof spaces. Once it’s brittle, moving or disturbing it can expose live conductors. If you see this kind of cable in your roof space or at the switchboard, it’s a strong sign those circuits need replacing.
Ceramic fuses and old switchboards
Ceramic rewireable fuses protect wiring from overload but offer no protection against electric shock. Older boards are often mounted on dark bituminous backing boards that, according to Asbestos NSW, date from before 1987 and may contain asbestos. Don’t drill, cut or sand them.
Lighting circuits without an earth
Many older lighting circuits were installed without an earth conductor. That was normal at the time, but it limits which modern light fittings can be safely installed, particularly metal fittings.
Layers of additions
Over the decades, many homes have had circuits extended, kitchens added, rear extensions wired, and sometimes DIY work done. The result can be a patchwork of old and new cable joined in the ceiling, with circuits that don’t match the switchboard labels.
Warning signs to look for
You can safely check most of these without opening anything:
- ceramic fuses in the switchboard
- no device with a Test button (no safety switch)
- a black or dark brown backing board behind the fuses
- cloth-covered or hard, cracked rubber cable visible in the roof space (look, don’t touch)
- switches or power points that feel warm, buzz or are discoloured
- flickering lights or lights that dim when appliances start
- power points with only two pin holes (no earth), or very old round-pin outlets
- lots of double adaptors and power boards
- a burning smell from any outlet or switch (urgent)
If you tick several, book an inspection. If you smell burning or see scorching, turn off the circuit and call an electrician straight away.
Testing before rewiring
A licensed electrician can test the insulation resistance of each circuit to show how healthy the cable is. That lets you make an evidence-based decision:
- circuits that test well and are in sound condition can often stay
- circuits that fail, or that use perished rubber cable, should be replaced
- the switchboard can be upgraded with RCD or RCBO protection on every circuit
This approach can turn a “full rewire” into a targeted job, or confirm that a full rewire really is the best value. See our guide to the cost of rewiring a house in Sydney.
Protecting heritage features
Inner West homes often have features worth protecting: ornate cornices, ceiling roses, pressed-metal ceilings, timber architraves, original skirting and fireplaces. Good planning helps:
- Use the roof space and subfloor wherever possible to run cable.
- Reuse existing cable paths and cavities.
- Consider surface conduit in out-of-the-way places, rather than chasing into old plaster or brick.
- Choose fittings that suit the house, such as pendants rather than downlights in decorative ceilings.
- Plan with your plasterer if any patching is needed, especially for lath-and-plaster walls.
Much of the Inner West is in heritage conservation areas. Internal electrical work generally doesn’t change how a home looks from the street, but things like moving a meter box or adding external fittings to the façade might. Check with Inner West Council before changing anything visible from the street.
Supply and meter work
Older homes sometimes have old consumer mains, an overhead service connection, or a meter in an awkward spot. Upgrading those is supply-side work done by an Accredited Service Provider (ASP) Level 2. Blue Link Electrical Services isn’t Level 2 accredited, so if your upgrade needs it we’ll tell you early and you’ll need a Level 2 ASP for that part.
A sensible upgrade path
- Inspection and testing: find out what you really have.
- Fix anything dangerous now: heat damage, exposed conductors, failed insulation.
- Upgrade the switchboard: RCD or RCBO protection on every circuit. See the 8 signs you need a switchboard upgrade.
- Replace failing circuits: starting with the worst.
- Plan the extras: more power points, better lighting, EV and induction circuits, ideally while walls and floors are open during a renovation.
Living in an older home? We work on terraces, cottages and Federation homes right across the Inner West, from Annandale and Camperdown to Petersham and Hurlstone Park. See our electrical safety inspections, or call 0421 772 661.
Frequently asked questions
How do I know if my house has old rubber wiring?
Look at the cable in the roof space or at the switchboard without touching it. Rubber-insulated cable often looks black, hard or cracked, sometimes with a cloth covering. An electrician can confirm it and test it.
Does old wiring always need to be replaced?
Not always. Insulation resistance testing shows which circuits are sound. Perished rubber cable and circuits that fail testing should be replaced.
Will rewiring damage my heritage ceilings?
It doesn’t have to. Careful planning uses roof and subfloor access, existing cavities and discreet conduit to avoid damaging ornate ceilings and cornices.
Do I need council approval to rewire a heritage home?
Internal electrical work generally doesn’t need council approval, but changes visible from the street, such as moving a meter box, may. Check with Inner West Council if you’re in a heritage conservation area.