Steps to Upgrade to Three Phase Power
2026-10-10
A practical, step-by-step guide to upgrading your property from single phase to three phase power, from assessing your needs to getting connected.
A practical, step-by-step guide to upgrading your property from single phase to three phase power, from assessing your needs to getting connected.
Plain English guides on three phase power upgrades, switchboards and ducted air conditioning for Australian homes and businesses. Always hire a licensed electrician and check their electrical contractor licence number.
Most people looking into a three phase power upgrade start with the same handful of questions. Will a ducted system fit my roof? Do I actually need three phase, or is that just sales talk? How long does a switchboard upgrade take, and will the power be off all day?
These guides answer those questions in plain English, with no jargon and no scare tactics. Every electrical job is different, so always hire a licensed electrician and check their electrical contractor licence number before any work begins.
Our most-read guides. New guides are added as common questions come up.
An induction cooktop, an EV charger and a ducted system all at once may push a single phase supply past its comfortable limit. We run through the indicators, plus the ones that mean you can stay on single phase and avoid the upgrade cost.
Old ceramic fuses, no safety switches, and a board with no spare room. Here is how a modern switchboard is laid out, how long the power is off during the changeover, and what a licensed electrician should be checking.
Oversizing a ducted system is more common than undersizing, and it costs you every summer. We explain how room by room load is calculated, why zoning matters more than raw kilowatts, and what running costs can look like.
Every guide starts with a question that comes up often, and is written to be clear and practical for Australian households and small businesses.
When the same question keeps appearing, it usually means the information out there is confusing or, worse, designed to upsell.
Guides are written carefully and updated when details change. They are general information only, not advice about your specific property.
If the answer is that you may not need three phase yet, or that a split system is a better fit, the guide says so. Always confirm the details for your own home or business with a licensed electrician, and check their electrical contractor licence number.
Yes. If it is a common one, we will often turn it into a full guide.
Guides are dated and any figures are checked at that time. Costs and regulations change, so treat older figures as a general guide only and confirm current details with a licensed electrician.
Yes. Most guides focus on homes because that is where the confusion is highest, but there are also guides on commercial switchboard and three phase topics.
You are welcome to link to any guide. For full republication, please get in touch first.
These guides are general information only. For anything specific to your home or business, hire a licensed electrician and check their electrical contractor licence number.