The key points
- A new enclosure does not automatically renew all of the house wiring.
- Include future appliances in the assessment.
- Agree the outage, inspection and certificate arrangements before work starts.
Start with the reason for the upgrade
A switchboard upgrade might be prompted by deteriorated equipment, an inspection finding or the addition of a large appliance. Those are different jobs. Make a short list of the problem you want solved and the equipment you plan to add over the next few years.
For example, an induction cooktop now and an EV later can affect decisions about spare space and supply capacity. That does not mean everything must be installed immediately. It means the electrician can assess the whole plan before you pay for work that may need changing again.
Ask what is being replaced and what is staying
A quote should identify the enclosure, protective devices and circuits included. It should also explain whether the main supply, earthing or any existing circuit faults need work. A fresh-looking board does not establish that all concealed wiring has been replaced or assessed beyond the agreed scope.
If an older backing panel may contain asbestos, ask how it will be assessed and handled. Do not drill, cut or disturb it to provide a better photo. Safe external photos are enough for the first enquiry.
- Which circuits receive new protection?
- Is earthing or mains work included?
- What happens if testing reveals an existing fault?
- Are removal and making good included?
Compare like-for-like quotes
The lowest total is difficult to judge if one quote includes extra protection, distributor coordination or rectification that another excludes. Ask each contractor to describe the same end result. Separate definite work from allowances and possible work identified only after testing.
Avoid treating a photo estimate as a guarantee of the concealed installation’s condition. A clear site assessment and a written change process are more useful than an unexplained promise that every possible issue is included.
Plan the day around the power interruption
Agree the expected outage and access time. Save computer work, consider fridge and freezer use, and discuss any equipment that must remain powered. Medical equipment or essential care needs require a specific contingency agreed before the visit.
Keep access to the board clear and make sure the person authorising changes can be reached. If testing finds a defect, a quick, informed decision can prevent an avoidable second visit.
Know what should happen at handover
Ask for clear circuit labels and a demonstration of the installed protective devices. Keep the quote, invoice and electrical paperwork together so the next electrician can see what changed.
Energy Safe Victoria requires a Certificate of Electrical Safety for electrical installation work. Prescribed work, including certain main-switchboard work, requires an independent inspection before the certificate is finalised. Confirm which process applies to your scope.
Quick answers
- Do I need to be home for a switchboard upgrade?Someone should be there at the start and at the end, and the electrician needs access to the switchboard and to the rooms inside for testing.
- Will my fridge and freezer be OK during a switchboard upgrade?Usually, with some planning.
- When will I know the price?Before any work starts.
- What is a sub-board, and do I have one?A sub-board is a smaller switchboard fed by its own cable from a circuit breaker on your main switchboard.
Planning advice for homeowners. Installation requirements depend on the property and equipment. Where this guide refers to Victorian safety or rental rules, use the linked official guidance for the current requirements.

