Going All Electric in Your Inner West Terrace? What Your Switchboard Needs to Handle

Does going all electric mean your Inner West terrace needs a new switchboard? In most cases yes, because replacing a gas cooktop, gas hot water and gas heating with electric equivalents adds far more continuous load than an old fuse box or undersized board was ever designed for. The fix is rarely the switchboard on its own either, it is usually a combination of switchboard capacity, consumer mains size and sometimes a look at whether single phase supply is still enough for everything you want to run.

⚡ Quick Answers: Going All Electric in an Inner West Terrace

• Will my old switchboard cope with an induction cooktop, heat pump and EV charger together? Rarely on its own. AS/NZS 3000's maximum demand tables treat each of these as genuine continuous load, not light appliance use, so the combined total usually exceeds what a 1960s or earlier board was ever rated for.
• Does an induction cooktop need its own circuit? Yes, and the circuit rating depends on the cooktop's total energy rating, a bigger cooktop needs a heavier dedicated circuit than most existing kitchen wiring provides.
• Do I need three phase power to go fully electric? Not always. Plenty of Inner West terraces stay single phase with a properly sized switchboard and consumer mains, but it is worth checking if you are adding EV charging, heat pump heating and induction cooking all at once.
• What about my old rewireable fuses? Any switchboard replacement triggers a full upgrade away from rewireable fuses under NSW service rules, not just a fuse wire swap.
• Does the gas disconnection happen at the same time? No, disconnecting a gas meter is handled by a licensed gasfitter and your gas retailer. The electrical upgrade and the gas disconnection are two separate jobs that are best sequenced together.
• Will I need a new earth stake? Often yes, a full switchboard replacement is one of the trigger points for an MEN earthing check on an older terrace.

1. Why one appliance swap is different from going fully electric

Swapping a single gas appliance for an electric one rarely troubles an existing switchboard. A new electric kettle, an extra lamp, even a small electric heater usually fits inside the spare capacity most homes already have. Going fully electric is a different proposition entirely, because you are typically adding an induction cooktop, a heat pump hot water system, and often heat pump space heating and an EV charger, all onto a board that was originally sized around gas doing most of the heavy lifting.

This matters most in the Inner West's older housing stock. A Federation or Victorian terrace in Leichhardt, Balmain, Annandale, Rozelle or Glebe, or a California bungalow around Petersham, Stanmore or Dulwich Hill, was built at a time when gas carried cooking, hot water and often heating, and the electrical installation was sized accordingly. Shifting all of that load onto the switchboard is exactly the scenario Australian wiring rules expect a proper maximum demand calculation for, not a guess.

2. Working out your real maximum demand first

Before anyone talks about switchboard size, the first real question is how much load the finished, fully electric home will actually draw. AS/NZS 3000's domestic maximum demand method adds up every load group, lighting, general socket outlets, cooking appliances, hot water and anything else, to arrive at a genuine current figure rather than simply totalling the nameplate rating of every appliance in the house. A proper assessment measures or calculates this before any equipment is ordered, the same approach we use when power logging a property before adding EV charging, solar or a battery. Skipping this step is how homeowners end up with a switchboard that passes inspection on day one and trips constantly once every appliance is actually in use.

3. Sizing the circuit for an induction cooktop

Induction cooktops draw considerably more continuous current than a typical gas cooktop's electrical ignition and controls ever did. The circuit rating for a fixed cooking appliance is set by its total energy rating. A cooktop rated up to 5000 watts can usually run on a 16 amp circuit, but a larger cooktop between 10,000 and 13,000 watts needs a 32 amp circuit, and anything above that steps up again to 40 amps. Most original terrace kitchen wiring was never run with anything close to this in mind, which is why a genuine induction conversion is a new dedicated circuit job, not a case of reusing the old gas cooktop's point.

4. Heat pump hot water and heat pump heating add their own load

A heat pump hot water unit and, increasingly, heat pump ducted or split system heating each need their own isolating switch arrangement under AS/NZS 3000, the same rule that applies to a standard split system air conditioner. If you already have air conditioning installed, see our guide to air conditioner isolating switches for how that requirement works, the same principle extends to a heat pump hot water unit and to heat pump heating equipment. The point that matters for a full electrification job is that each of these is its own load group on the maximum demand calculation, not a minor add on, and each one needs a properly rated circuit back to a switchboard with room to take it.

5. EV charging tips the balance for a lot of terraces

Add an EV charger into the mix and a lot of Inner West terraces move from genuinely borderline to clearly needing a switchboard upgrade. A dedicated EV charging circuit is assessed at its full rated current for maximum demand purposes, which is a much bigger single load than almost anything else in a typical home. If you are planning EV charging alongside the rest of an all electric conversion, it pays to size the whole job around that final combined load from the start rather than adding the charger as an afterthought once the switchboard has already been replaced for everything else. Our sister site HD Power Pole has a guide to EV charger capacity on pole fed properties that covers the same maximum demand thinking for homes connected through a private power pole rather than a standard street connection.

6. Single phase or three phase: when the question actually matters

Most Inner West terraces run on single phase supply, and plenty can stay that way even after going fully electric, provided the consumer mains and switchboard are sized properly for the combined load. Three phase becomes worth investigating when you are stacking EV charging, heat pump heating and induction cooking on a property that already has limited headroom, because spreading that load across three phases rather than one can avoid voltage drop problems and reduce how much the consumer mains themselves need upsizing. A three phase upgrade also means a new application to your network distributor, so it is worth checking your network area in seconds with our postcode checker early, since Ausgrid and Endeavour Energy have different application processes. Our main site's single phase to three phase upgrade guide covers what that process actually involves.

7. What a full switchboard replacement drags in with it

A full switchboard replacement is rarely an isolated job once you look closely at an older terrace. If the property still has the original imperial era wiring, see our guide to original wiring in Federation and California bungalow homes for what that can mean for the rest of the rewiring scope. If any part of the service side still runs through rewireable fuses, NSW service rules require the whole fuse assembly to be replaced in full the moment it is touched, not just the fuse wire, which our rewireable fuses guide explains in detail. A full switchboard replacement is also one of the standard trigger points for an MEN earthing check, covered in our earthing guide for older Inner West terraces, and if your semi or terrace still shares a switchboard with next door, see our shared switchboard guide before you plan the new board's layout.

Why This Often Needs More Than a Standard Electrician

Most of the work inside a full electrification job, the new circuits, the switchboard itself, the isolating switches, sits within a standard licensed electrician's scope. Where it crosses into Level 2 ASP accredited territory is anywhere the consumer mains or the service connection also need upsizing, which is common when a single phase supply that was only ever sized for a gas dominated home needs to grow to support the finished all electric load, or where a three phase upgrade is on the table. It is worth having a Level 2 ASP accredited team scope the whole job from the point of attachment through to the switchboard, rather than discovering partway through that the consumer mains are the real bottleneck.

8. Sequencing the gas disconnection

Disconnecting a gas meter and capping off the gas service is handled by a licensed gasfitter working with your gas retailer, not by an electrician, and it is a genuinely separate job from the electrical upgrade. The two are best planned together so the house is never left with cooking or hot water simply switched off mid project. A sensible order is usually the electrical assessment and switchboard work first, confirming every new electric appliance is wired, tested and working, and only then arranging the final gas disconnection once there is no reason left to keep the gas supply connected.

How High Demand Electrical Helps

We are a licensed local team, not a call centre, and full electrification jobs on older Inner West terraces are exactly the kind of work we see regularly across Leichhardt, Balmain, Annandale, Marrickville, Dulwich Hill, Petersham and the surrounding suburbs. Our site assessment covers the whole chain, from your existing switchboard and consumer mains through to whether a three phase application makes sense, so you get one coherent scope rather than appliance by appliance guesswork. If you want a guide to what a switchboard upgrade on its own typically involves, see our switchboard upgrade cost guide for the Inner West.

All Electric Terrace FAQs (Sydney)

Can I go all electric without upgrading my switchboard at all?

Only if a proper maximum demand calculation shows your existing switchboard and consumer mains already have enough spare capacity, which is uncommon on an older terrace adding cooking, hot water, heating and EV charging all at once. See our switchboard upgrades page for what an upgrade typically involves.

Does my electric vehicle charger have to be installed at the same time as the rest of the upgrade?

No, but it is worth telling your electrician about EV charging plans even if the charger itself is coming later, so the switchboard and consumer mains are sized for the final load from the start rather than needing a second upgrade.

What order should the work happen in?

Generally the electrical assessment and any switchboard or consumer mains work comes first, followed by installing the new electric appliances, with the gas disconnection arranged last once everything electric is tested and working.

Does an older terrace always need three phase power to go fully electric?

No. Many Inner West terraces complete a full electrification with single phase supply and a properly sized switchboard. Three phase is worth investigating on properties stacking EV charging, heat pump heating and induction cooking with limited existing headroom.

Will my insurer need to know about the change from gas to electric?

Check your policy, since insurers can treat a significant change to a home's services as something worth declaring. This sits outside what an electrician can advise on, so it is worth a quick call to your insurer alongside the electrical planning.

Thinking about going all electric in your Inner West home? Get a Switchboard Upgrade Quote or call 0402 559 777. Every job needs a site assessment before we can confirm scope or pricing, since no two terraces carry the same existing load or wiring.