Choosing the ideal electric oven capacity boils down to understanding your kitchen habits. Do you whip up meals for one or two or cater for family feasts? This guide dives into essential factors to consider when selecting the best oven size for your kitchen.
If you’re considering buying a new electric oven, you often consider the overall appeal of the appliance, how it fits your interior design theme, and the physical size of the oven. That is, how large the cooking space is, often considering what meals you could cook in it.
However, most Sydney homeowners leave a crucial factor out when deciding what to buy. That is the oven’s power draw or electrical capacity.
More often than not, Sydneysiders would buy a 90cm freestanding induction oven, only to find out their home’s kitchen circuit or switchboard can’t handle the high electrical demand.
But by balancing a large enough cooking space for your Sunday roasts with the limits of your household wiring, you can save money in the long run from unexpected electrical upgrades.
This guide will help you find the right oven size that matches your cooking needs and makes sure your home’s electrical system is safe, up to code, and ready to handle the load.
By understanding both the physical and electrical requirements of oven size, you can choose the perfect appliance for your newly renovated kitchen.
Compact electric ovens are excellent for Sydneysiders living in an apartment or as a secondary oven for quick meals. Smaller ovens heat up faster, saving you energy when cooking small dishes, making them efficient and effective for cooking and simple baking.
If you’re living in an average-sized standalone household, a standard 60-85L electric oven is your go-to. With its size, you can cook a standard roast and a side dish without any problems, making it ideal for those who need enough space and wants to keep at-home cooking practical and accessible.
Most standard-sized ovens also fit well into kitchen cabinets, making these 60L single ovens the popular choice for Sydneysiders renovating their kitchen.
If you’re a home cook with a large family who love to do multiple dishes every weekend at different cooking temperatures, then it’s time to consider going big with 90cm wide or double ovens.
Bakers who need extra space for bigger trays will find double ovens very useful, as they basically remove the need to wait until the first dish is done before adjusting the temperature and starting another.
Think about being able to roast a Christmas ham while baking several side dishes or desserts at the same time, saving a lot of time during big family events and special occasions.
How much power an electric oven needs will determine the circuit capacity or size needed. This is often the determining factor of whether your current household power points can accommodate a new electric oven, or whether you need to upgrade your switchboard first before the oven upgrade pushes through.
Electric oven capacity is calculated by converting kilowatts (kW) to amps (A). Electricians use a simple formula:
For example, a standard 3.6kW oven uses about 15.6 amps.
Because of this high demand, AS/NZS 3000 wiring rules say that ovens using over 10A or 15A shouldn’t share general wall outlets [1]. That’s why electric ovens need a separate power point or circuit running from your switchboard to ensure a safe and reliable power supply that does not share demand with other plugged-in appliances.
Using shared kitchen circuits for heavy appliances can cause frequent tripping and increase the risk of a fire.
Moreover, the cable size and breaker capacity must be matched exactly to what your appliance needs. A standard 60cm oven usually needs 2.5mm² wire with a 20A breaker.
But if you opt for a large 90cm oven, you’ll need heavy-duty 6.0mm² wire and a 32A breaker to safely handle the massive electrical load. Note that this is just a general example, and the actual requirement will depend on what’s written in your chosen oven’s rating plate.
Making sure your wiring is the right size helps prevent overheating inside your walls.
Before starting any kitchen renovation, you must get a licensed electrician to do a maximum demand calculation.
This involves looking at the total power needed in your kitchen, including the new oven, your induction cooktop, and other high-demand appliances like your HVAC system.
By evaluating the total load, your electrician can decide if your current single-phase setup is enough or if you need a full 3-phase upgrade to avoid constant tripping and prevent dangerous overloads or power cuts during busy cooking times.
Upgrading your switchboard ensures your home can safely support all your modern, high-powered appliances working at the same time, keeping your home safe and your kitchen running smoothly.
Proper planning before installation can save you from expensive changes later on.
When choosing between these oven types, you need to think about what you like to cook and how much space and electricity your kitchen has.
Here’s a breakdown of each option:
|
Configuration |
Pros |
Cons |
|
60cm Single Oven |
Uses less energy for everyday meals, is cheaper to install, and fits well in most cabinets. |
Not wide enough for large baking sheets, and can’t cook big meals at the same time |
|
60cm Double Tower Oven |
Lets you grill in one part and bake in the other at different temperatures. |
Needs a lot of vertical space in the wall, which takes away from regular storage and makes it harder to arrange the kitchen. |
|
90cm Freestanding Range |
Has a wide interior for big baking sheets and roasts and looks great in the kitchen. |
Needs heavy wiring (32A or 40A), takes up a lot of floor space, and takes longer to heat up. |
The 60cm single oven is the best choice for most homes because it’s efficient and easy to fit.
But if you often cook for many people, the 90cm freestanding range gives you more cooking space, although you need to upgrade your wiring if you want to use it.
The 60cm double tower oven is a good middle option; it gives you more control and flexibility without needing the same amount of power or space as the 90cm model.
Ultimately, the right oven depends on how you cook, how much room you have, and the power your home can handle.
In New South Wales, electric ovens are hardwired directly into the home’s main electricity system. This creates serious safety risks, so it’s required to have a professional install the oven.
Using the wrong wire size can cause cables to overheat, melt insulation, and even start a fire. Even a small error in the way wires are connected can lead to long-term electrical problems or immediate dangers.
In NSW, it is outright illegal to install and wire an oven yourself [2]. Not only that, but you also risk voiding your home insurance and placing the burden of responsibility to you for any damage that occurs due to the installation.
To keep you safe from financial and legal responsibilities, always hire a qualified electrician to make sure the electric oven installation service is done safely and correctly.
We recommend Bright Force Electrical if you need help with your oven installation.
A licensed Sydney electrician will ensure the wiring, breakers, and connections are the right size and securely fixed.
This keeps your home safe, keeps the manufacturer’s warranty valid, and gives you peace of mind every time you use the oven.
Most built-in ovens use more than 15A and need to be hardwired directly to the switchboard.
Even some small ovens have 10A or 15A plugs, but regular-sized ovens can’t safely use the general power circuits.
Yes, larger 90cm ovens use more power (usually 4.5kW to 6kW), compared to 60cm ovens which generally use 2.5kW to 3.6kW.
Not always, but using a high-draw oven and a powerful cooktop together can exceed the standard single-phase limit.
In such cases, a 3-phase upgrade is recommended to prevent tripped breakers and ensure stable operation.
Gross capacity is the total internal volume of the oven.
Net usable capacity is the actual space you can use for cooking after accounting for items like fans and heating elements. Always check your largest baking trays against the net usable capacity to make sure they fit.
It’s important to pick an oven that fits your family’s cooking needs in litres to keep things running smoothly. However, you should always check if your electrical switchboard and wiring can handle the oven’s power before making a purchase.
Ignoring the technical details can cause expensive problems and unsafe electrical issues.
To avoid this, make sure your kitchen’s wiring and switchboard are prepared for the oven’s load by reaching out to Bright Force Electrical.
Don’t gamble with your renovation. Book an electric oven installation service or call our licensed Sydney electrician at 1300 724 942 for a clear, fixed-price quote today.
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