Commercial sites add load constantly. A new piece of kitchen equipment, a server rack relocation, an extra desk pod in an open-plan office, a coffee cart in the foyer — each one needs a circuit that's rated for the job, plumbed into the right board, and certified. Millar Electrics installs commercial GPOs, dedicated circuits and three-phase outlets across Melbourne's eastern suburbs, with the install scheduled around trading and the paperwork done before we leave.
Sizing circuits for commercial loads
The starting question on any commercial circuit isn't "what plug does it need" — it's the equipment's plate rating, its inrush, and whether it'll run alongside other loads on the same board. Hospitality and food-service equipment, server-rack power, induction-cooktop kitchens, and EV chargers all want their own dedicated circuits, and most warrant a circuit-level RCBO rather than a shared RCD. Where the existing switchboard doesn't have spare ways, we extend the sub-board cleanly rather than stacking adapters or doubling-up circuits on an already-loaded breaker.
In-floor power and open-plan offices
Open-plan offices live and die by where the power and data come up out of the floor. We install flush Clipsal or HPM floor boxes off a tenancy sub-board, with both power and data cores in the same trench, and bring the run back to the comms cabinet without a forest of cable trays. The result is a tenancy you can rearrange without rewiring it — desks move, the floor boxes don't.
Three-phase, industrial, and after-hours work
For industrial sites — workshops, manufacturing, small-bay tenancies — we install three-phase outlets (32A, 40A, and 5-pin sockets) coordinated to the machinery's nameplate and motor-starting current. Most commercial install work happens after-hours or during low-trading windows: the work is staged so adjacent tenancies aren't affected, the board isolation is coordinated with the building manager, and the site's open for trade the next morning.
Standards we work to
New circuits and additional GPOs are installed to AS/NZS 3000, with socket-outlets meeting AS/NZS 3112 for general-purpose outlets and AS/NZS 3123 for the heavy-duty industrial types. Cable sizing is calculated under AS/NZS 3008 for the run length, ambient temperature, and circuit current. RCD protection on every new final sub-circuit is required by AS/NZS 3000. Three-phase outlets and isolation arrangements for machinery follow AS/NZS 3947 for low-voltage switchgear. Sub-board SPDs are installed to AS/NZS 1768 where surge protection is in scope.