Electricity Supply Upgrades in Melbourne: Options and Process
An electricity supply upgrade changes the capacity or arrangement of the power connection serving your property. It is different from simply adding a circuit or replacing a switchboard. Start with a load assessment so the proposed work solves the actual constraint.
Identify which part of the installation needs work
A supply project can involve the network connection, consumer mains, metering, earthing and switchboard. Some of those assets and tasks belong to the electricity distributor or metering provider; others form part of the customer’s installation.
Adding an EV charger, electric cooking or other equipment does not prove that every part needs replacing. Ask the electrician to explain what was assessed, where the limitation is and which party is responsible for each proposed change. Repeated tripping also needs diagnosis; it is not automatically evidence of inadequate street supply.
Single-phase, three-phase and underground are different choices
| Option | Why it may be considered | What still needs checking |
|---|---|---|
| Retain single-phase | The assessed loads can be accommodated, possibly with scheduling or suitable load control. | Existing capacity, equipment requirements and the proposed design. |
| Change to three-phase | Specific equipment or the assessed demand justifies it. | Network availability, metering, mains and distribution of loads. |
| Convert overhead to underground | A changed connection route, site layout or network requirement calls for it. | Connection approval, civil works, other services and reinstatement. |
An underground connection is a routing choice, not a guarantee of greater capacity. Three-phase is also not a promise that every appliance will run faster. Compare the benefit against your actual equipment and future plans.
Establish the network requirements before booking work
The Victorian Service and Installation Rules set the distributor connection framework. Use the current edition and the requirements of the network serving your address; a suburb name alone should not be used to assume the distributor.
Applications, metering arrangements and fees depend on the project. AusNet’s connection information is one example of a network-specific process, not a process that applies to every Melbourne property. Ask who will submit each application and who will pay or receive any separate network and metering invoices.
Agree on a sequence for approvals, work and reconnection
- Assess the existing installation and planned loads.
- Define the proposed scope and obtain the necessary approvals.
- Coordinate any civil works, access and equipment deliveries.
- Arrange the authorised disconnection, electrical work, testing and required inspection.
- Coordinate reconnection and retain the completed records.
Do not remove service fuses, disturb meter seals or alter network equipment yourself. Prescribed installation work requires an independent licensed electrical inspector before it is energised. The actual work determines classification; see Energy Safe’s guidance.
Discuss expected outages before work starts, including any medical equipment or other essential loads. An appointment for the electrical contractor alone is not confirmation that all other parties are booked.
Ask for a quote with separate electrical and civil costs
The useful comparison is the complete project scope. Ask about mains and board work, inspection, network fees, metering, trenching or boring, access equipment and restoration of concrete, paving or landscaping. Identify provisional amounts and work excluded from the total.
Timeframes depend on approvals, network scheduling, access and the condition found on site. Request a proposed sequence and the dependencies that could move it. A universal one-day installation promise or a fixed number of approval weeks is not reliable for every supply project.
Get the supply assessed before committing to equipment
Prepare a list of the loads you already use and the additions you are considering. Include the actual model requirements where available, and explain which appliances are likely to run at the same time. For an EV, include the vehicle and normal charging window.
Ask Amber Pro about an electricity supply assessment before committing to a larger connection. Where a targeted circuit or board change is sufficient, the recommendation should explain that; where network work is necessary, it should identify the extra approvals and responsibilities.
Frequently asked questions
Is a switchboard upgrade the same as a supply upgrade?
No. A new switchboard does not automatically increase the network connection or consumer-mains capacity. The required work must be assessed as a whole.
Does every EV charger need three-phase?
No. Many homes can use a suitable single-phase charging arrangement. Assess the vehicle, household demand and charging schedule before choosing a supply change.
Can a supply upgrade be quoted from photographs alone?
Photographs can help establish the initial scope, but cable routes, existing condition and network requirements may need further checks. Do not remove covers or access electrical equipment to take them.