Electrical Wire Colours in Australia: The Complete Chart (Old and New)

What do the electrical wire colours in Australia mean? In fixed house wiring, the earth is green/yellow, the neutral is black or light blue, and the active can be any other colour, with red or brown the usual choice. Flexible cords and appliance leads use the European scheme instead: brown active, light blue neutral, green/yellow earth. The catch is that older homes and imported equipment mix in other schemes, so colour alone is never proof of what a wire does.

⚡ Quick Answers: Australian wire colours

• What colour is the active wire in Australia? In fixed wiring, usually red or brown, but the rules allow any colour that is not green, yellow, green/yellow, black or light blue. In flexible cords it is brown.
• What colour is neutral? Black or light blue in fixed wiring, light blue in flexible cords. This is the big trap: black is a neutral colour in Australian house wiring but a live phase colour in European cables.
• What colour is earth? Green/yellow stripes. Older installations used plain green or even bare copper, which is one of the clues a home has older wiring.
• What are the three phase colours? Australian convention is red, white and dark blue for the three phases. European-coded cables use brown, black and grey.
• Can I rely on colour to tell if a wire is live? No. Schemes overlap across eras and imports, and any conductor should be treated as live until a licensed electrician tests it.

1. Current colours for fixed house wiring

The Wiring Rules set conductor colours for installation wiring in Table 3.4 of AS/NZS 3000. Earth and equipotential bonding are green/yellow, neutral is black or light blue, and the active can be any colour other than those reserved ones. In practice, the flat cable running through Australian walls today most commonly has a red active, black neutral and green/yellow earth.

2. Flexible cords and appliance leads

The lead on your kettle, lamp or extension cord follows the harmonised European scheme: brown for active, light blue for neutral, green/yellow for earth. Older Australian flexible cords used red for active, black for neutral and green for earth, and plenty of those older leads are still in service on older appliances.

3. Three phase colours

Australian three phase cabling conventionally runs red, white and dark blue for the phases, with a black neutral and green/yellow earth. European-coded cables, common in imported machinery and some multicore cables, use brown, black and grey phases with a blue neutral. The standard does not allow the two colour systems to be mixed within the same enclosure or cable, precisely because black and blue mean different things in each.

4. What older wiring looks like

Colour is one of the fastest ways to date an installation. Plain green earth conductors, or bare copper earths, belong to earlier editions of the rules; today they may remain in service, but any new joint or termination on them has to be sleeved green/yellow. The same goes for old yellow actives, which get sleeved white when altered. Go back further and you find rubber insulation with cotton braid in faded reds and blacks, often crumbling at every junction box.

If your home still runs on that era of wiring, the colours are the least of it: insulation breaks down, earths go missing, and there is usually no safety switch protection behind any of it. Our guides to residential rewiring in Sydney and earthing and bonding basics cover what modern wiring does differently.

5. Why you never trust colour alone

Every electrician has opened a junction box where a black wire was live. Sleeving legitimately changes a conductor's role, imported equipment carries foreign schemes, and decades of handywork leave surprises the rules never sanctioned. That is why the trade tests before touching, every time, and why the only safe assumption for you is that every wire is live. In NSW, fixed wiring work is illegal without a licence, so identification is where a homeowner's job ends, and it is genuinely useful there: knowing your home has older wiring is a good reason to book an electrical safety inspection.

Colour questions also come up at the switchboard, where the mix of eras is most visible. Our posts on isolators and main switches and what the Wiring Rules actually cover are the natural next reads, and the clause finder on our free tools page lets you look up the rule behind any of this in plain English.

How High Demand Electrical helps

We inspect, test and identify before we touch anything, and we see every era of Sydney wiring in a normal working week, from cotton-braided reds to brand new brown and blue. If an inspection turns up old colours, missing earths or perished insulation, we give you a clear picture of what is actually urgent and what can wait, then handle everything from single repairs to a full Level 2 scope including consumer mains and switchboard work.

Wire colour FAQs (Sydney)

My power point has red and black wires. Is that wrong?

Not necessarily. Red active and black neutral is still standard in Australian fixed wiring. What matters is condition and correct connection, which is a test, not a glance.

I found plain green earth wires. Should I worry?

Plain green earths were compliant under earlier rules and may remain, but they signal older wiring. An electrical safety inspection will tell you whether the rest of the installation has aged along with them.

Why is my appliance lead brown and blue but my house wiring red and black?

Two different rule sets. Flexible cords follow the harmonised European colours, while Australian fixed wiring keeps its own scheme. Both are correct in their own domain.

Can I replace a light switch myself if I match the colours?

No. In NSW, fixed wiring work including switches and power points is licensed work, and colour matching is exactly how DIY jobs go wrong, because colours cannot be trusted without testing.

Unsure what era of wiring is behind your walls? Book an electrical safety inspection or call 0402 559 777. Every job starts with a site assessment so scope and pricing are confirmed before work begins.