A switchboard that protects every circuit

Most electrical faults in Australian homes don't start at the outlets or the appliances — they start at the switchboard. An ageing board with ceramic fuses, a rewirable fuseway, or a mix of old circuit breakers and no residual current devices is a liability that grows with every year it stays in service. Lumen & Wire specialises in complete switchboard replacements across Melbourne, upgrading outdated infrastructure to a modern, compliant installation that reflects how the modern household draws and manages power.

The difference between a board that was installed twenty or thirty years ago and a contemporary one isn't just cosmetic. Modern switchboards incorporate per-circuit residual current circuit breakers with over-current protection — commonly known as RCBOs — which provide both earth leakage detection and overload protection on every individual circuit. This is a significant improvement over the older arrangement of a shared residual current device protecting several circuits, where a fault on one circuit trips protection for an entire zone of the house. The result is a board that is safer, easier to diagnose, and far less disruptive when an isolated issue arises.

What a Modern Switchboard Includes

• Per-circuit RCBOs providing combined earth leakage and overcurrent protection to AS/NZS 3000
• Surge protection devices to guard sensitive electronics against transient voltage events
• Clearly labelled circuit directories that reflect the actual layout of your home
• Capacity headroom for future circuits — EV chargers, solar inverters, battery storage, pool equipment
• DIN-rail mounted components from Tier 1 manufacturers with documented fault ratings
• Three-phase supply termination where the network provides it or where load calculations demand it

Planning for What Comes Next

One of the most common frustrations we encounter is the switchboard that was upgraded five years ago but filled to capacity immediately — no space for the solar system the owners want to add, no dedicated circuit available for the EV charger, no provision for a battery system. We design boards with a realistic view of how electrical loads in Australian homes are changing. In 2026, a household that has or intends to have rooftop solar, an electric vehicle, and a home battery is not unusual. We account for all of that in the busbar rating, the main switch sizing, and the number of vacant ways we leave available.

Surge protection is another element we include as standard. The increase in smart home devices, inverters, and high-value electronics in the average Melbourne home has made transient overvoltage events significantly more costly when they occur. A Type 2 surge protection device mounted in the main board is inexpensive relative to the equipment it protects and requires no ongoing maintenance.

The Upgrade Process

A switchboard upgrade is typically completed in a single day for a standard residential installation. We coordinate the brief supply interruption with you in advance, work efficiently to minimise downtime, and carry out a comprehensive test of all circuits before power is restored. The completed board is photographed and documented, the circuit directory is printed and laminated, and the Certificate of Electrical Safety is issued and registered before we leave. If your meter box requires remediation as part of the upgrade — a common finding in older Melbourne properties — we liaise with your distributor to coordinate that element of the work.

Switchboard upgrades are also the right time to address any legacy wiring issues that have been identified in your home. Rather than completing the board upgrade and leaving known deficiencies in the circuit wiring, we'll discuss those findings with you and present a staged approach to addressing them if they can't all be resolved in one visit.