Electrical fault finding in Mernda
Tripping safety switches, dead circuits, flickering lights or tingles from taps in Mernda: what to do first, what to report and what fault finding costs.
If part of a Mernda house goes dark or one safety switch drops out again and again, start at the switchboard and unplug what runs on that circuit. A switch that refuses to reset means a licensed electrician has to trace the fault. Some symptoms are not a job for your electrician at all: dim or flickering lights across the whole house, or tingles from taps, go straight to the electricity distribution company. Published Melbourne prices for a fault finding visit run $160 to $420 per visit.
Enquiries sent through this site go to independent licensed electricians, who decide whether they can attend and when. This site cannot dispatch anyone and is not an emergency service.
What to do first
Energy Safe Victoria’s power outage and energy safety guide sets out these steps:
- Open the switchboard and look for a tripped safety switch. Reset any that has dropped.
- Ring a licensed electrician if the safety switch stays off.
- Turn appliances off. Power coming back while the house is empty could start a fire.
- For light, use a torch or a battery lantern.
- Leave repairs alone. Energy Safe calls DIY repairs unsafe and illegal.
When the switch drops again straight after a reset, the cause is usually a single appliance or a single circuit. With everything on that circuit unplugged, reset the switch and reconnect appliances one by one. If the trip follows one appliance, the appliance is the likely fault. If it trips with everything unplugged, the problem is in the fixed wiring and needs an electrician.
When to call the distributor instead
The same Energy Safe guide says that dull or flickering lights, brownouts, low voltage or partial supply mean you should not touch the switchboard or anything metal, should turn off easy-to-reach power points, and should call your electricity distribution business immediately. Tingles or shocks from an appliance or a water tap also go to the electricity company straight away, and a licensed electrician must then check the wiring. Stay at least 8 to 10 metres from any fallen powerline.
In Melbourne’s outer north the distributor is AusNet Services or Jemena depending on location. The Victorian Government’s distributor page lists both, and your bill shows which one serves your address.
Common faults and likely causes
| Symptom | Common causes | Who to contact |
|---|---|---|
| One safety switch trips repeatedly | Faulty appliance, water in an outdoor outlet or light, damaged cable | Licensed electrician |
| Power points dead in one area | Tripped breaker, loose connection at a point, failed outlet | Licensed electrician |
| Lights flicker on one circuit only | Failing LED driver, loose terminal, incompatible dimmer | Licensed electrician |
| All lights dim or flicker, partial supply | Supply or neutral problem on the network side | Distribution company first |
| Tingles from taps or appliances | Possible earthing or neutral fault | Distribution company, then an electrician |
| Burning smell, warm or discoloured outlet | Overheating connection | Switch off that circuit, then an electrician |
What the electrician will need
- When the fault started and whether it follows weather. Trips that start after rain can point to water in an outdoor light or outlet.
- What was plugged in or switched on when it tripped.
- Any recent work, such as a new air conditioner, a renovation or a solar install.
- A photo of the switchboard with the tripped device visible.
What fault finding involves
The electrician isolates circuits one by one, uses insulation resistance testing to find leakage to earth, checks connections at outlets, junction boxes and the board, and tests each safety switch. Once the fault is found, the repair is quoted or done on the spot if you agree. Any electrical installation work that results should come with a certificate of electrical safety.
Rental safety checks
Landlords must have an electrical safety check carried out every two years by a licensed or registered electrician, and the record must be kept and shown to a renter on request, according to Energy Safe Victoria’s rental safety check page. The obligation comes from the Residential Tenancies Regulations 2021. A check often turns up the same issues a fault call does, such as damaged outlets or safety switches that fail their test, and it may lead to a switchboard upgrade to meet the rental switchboard standard.
Older wiring
Energy Safe Victoria advises that if a house was built more than 30 years ago its wiring should be checked. Most Mernda houses are younger than that, since the suburb was built out from the early 2000s, but it matters around the original township areas and in Whittlesea, where homes from many decades sit beside new ones.
What a careful electrician will not do
- Replace a safety switch that is doing its job, just to stop the tripping, without finding the cause.
- Disconnect a safety switch or bridge out a circuit “for now”.
- Work on a switchboard showing signs of a supply-side fault before the distributor has checked it.
- Leave without explaining what failed and what was repaired.
Cost
| Item | Published Melbourne range |
|---|---|
| Fault finding visit | $160 to $420 per visit |
| Electrician labour per hour | $84 to $160 per hour |
| Replacement safety switch on an existing board | $160 to $370 per switch |
Most fault calls are charged as a call-out plus time, then parts. The Mernda cost guide explains how to ask for that structure in writing.
What to do next
Write down the symptoms, the circuits affected and what you have already tried, and describe the fault in an enquiry. For anything hot, smoking or sparking, turn the main switch off only if you can reach it safely, and call emergency services if there is a fire.
Frequently asked questions
- Why does my safety switch keep tripping?
It has detected current leaking somewhere on the circuit. The cause is often a faulty appliance or moisture in an outdoor fitting, but it can be damaged wiring. Unplug appliances on that circuit and reset; if it still trips, call an electrician.
- Should I call an electrician or the distributor for flickering lights?
If only one light or one circuit flickers, an electrician is the right call. If lights across the whole house dim or flicker, or you have partial power, Energy Safe Victoria says to contact your electricity distribution business straight away.
- Can I test my own safety switches?
Yes. Press the test button on each safety switch; it should switch off immediately. Reset it afterwards. If a safety switch does not trip when tested, have a licensed electrician replace it.
- How often do rental properties need an electrical safety check?
Every two years. The check must be done by a licensed or registered electrician, and the landlord or agent keeps the record and shows it to the renter if asked.
- How is a fault finding visit charged?
Usually as a call-out or service fee plus time on site, then parts for the repair. Ask for the hourly rate and the call-out fee in writing before the electrician starts.