Does your street number really decide which phase your private power pole connects to? In most cases, yes. The Service and Installation Rules of NSW set a standard phase allocation table that assigns every new single phase overhead or underground connection to phase A, B or C based on the last digit of your street or lot number, a system the network uses to keep the three phases of the local grid evenly loaded. If your private pole is simply being reconnected after a repair or a straightforward replacement, the rule is even simpler again: it goes back on whatever phase it was already connected to.

⚡ Quick Answers: Private Power Pole Phase Selection

Why does my street number decide my phase? The Service and Installation Rules of NSW use the last digit of your street or lot number to spread new single phase connections evenly across phase A, B and C, so no single phase of the local network ends up overloaded while the others sit underused.
What happens if I'm just reconnecting an existing pole? A reconnection after repair, storm damage or a like for like replacement goes back onto the same phase it was already on, not a new phase picked from the table.
Can I ask for a specific phase? No. Phase selection on a single phase connection follows the distributor's table, not personal preference, and your Level 2 ASP applies it the same way your network operator would.
Does this change anything if I'm going three phase? A three phase upgrade uses all three phases together rather than one allocated phase, so the single phase table stops applying once the new three phase service is energised.
What if a single phase appliance runs off a three phase supply? Even on a three phase service, a single phase controlled load such as an off peak hot water system still has its own phase chosen from the same table.
Does having a private pole change any of this? No. A private pole is simply where the point of attachment and the overhead or underground service happen to land, the phase allocation rule applies the same way whether your connection point is on your own pole or on the side of the house.

1. Why phase balancing matters to the network

Every street is fed from a three phase transformer, with individual single phase customers spread across phase A, B and C so the load on each one stays roughly even. If every new connection on a street picked the same phase, that phase would carry far more load than the other two, leading to voltage problems and uneven wear on network equipment. The Service and Installation Rules of NSW solve this with a simple, repeatable system rather than leaving it to guesswork on site.

2. The standard phase allocation table

For a new single phase overhead or underground connection, the rules set out a straightforward table: a street or lot number ending in 1, 4, 7 or 10 goes to phase A, a number ending in 2, 5, 8 or 20 goes to phase B, and a number ending in 3, 6, 9 or 30 goes to phase C. It looks almost too simple to be an official rule, but it is exactly how Ausgrid and Endeavour Energy, whichever network actually supplies your street, keep three phase balance across thousands of individual single phase services without needing a case by case engineering decision for every new connection. If you are not sure which network serves your address, you can check your network area in seconds with our postcode checker before any connection work begins.

3. Reconnecting an existing private pole after repair or replacement

The table above applies to a genuinely new connection. If your private pole is being repaired, straightened or replaced like for like after storm damage, age or a defect notice, the rule is simpler: the service cable is reconnected to the same phase it was on before, not reassigned from the table. This avoids a situation where internal wiring, timers or controlled load circuits that were set up around one phase suddenly end up on a different one for no operational reason.

4. What this means if you're going three phase

A single phase to three phase upgrade changes the picture entirely, because a three phase service uses all three phases together rather than relying on one allocated phase from the table. Once your pole fed property is reconnected as a three phase installation, the single phase phase selection table has nothing left to apply to on the main service itself, your Level 2 ASP sizes and connects all three phases as part of the upgrade.

5. Single phase loads riding on a three phase supply

Three phase doesn't mean every circuit in the house uses all three phases at once. A single phase controlled load, the classic example being an off peak hot water system on a dedicated tariff, still needs its own phase chosen when it's installed on a property with a three phase service. The rules apply exactly the same street or lot number table to that controlled load circuit as they do to a brand new single phase connection, so the load spreads evenly rather than every controlled load appliance on the street landing on the same phase by coincidence.

6. Why this isn't something you or your electrician can simply choose

It's a reasonable question: if phase balance is just about spreading load evenly, why not let the installer pick whichever phase is most convenient on the day? The honest answer is that convenience on one job is exactly how a street ends up unbalanced over years of individual connections, each one made with good intentions but no visibility into what every other property on the street has already been allocated. The table takes that judgement call out of the installer's hands entirely, which is also why your Level 2 ASP applies it the same way the network's own crews would, rather than treating it as a discretionary choice. The same discipline applies whether you own the pole outright or share responsibility for it, our guide to private power pole ownership and rules covers how that responsibility is split in different situations, and if your property ever needs a genuine second connection point rather than just a reconnection, that's a separate approval process the distributor assesses on its own merits.

7. Voltage drop and why balance still matters once power reaches your switchboard

Phase balance on the street has a direct effect on what you actually experience at your switchboard. The Service and Installation Rules of NSW cap voltage drop in the overhead or underground service itself at 3% of nominal voltage, and AS/NZS 3000 caps the total drop through your own consumer mains and circuits at a further 5% below the voltage at the street connection. An unbalanced phase carrying more than its fair share of load is more likely to sag toward those limits, especially on a private pole property where the service run from the point of attachment is often longer than a standard street connection. Correct phase allocation from day one, combined with properly sized consumer mains, is part of what keeps voltage at your switchboard sitting comfortably inside those margins rather than near the edge of them. This is the same voltage budget that matters when a pole fed property later adds solar or a battery, where the 1% voltage rise rule shares the same underlying cable and phase considerations.

If your property is fed via a rear lane private pole rather than a standard street frontage, which is common across older housing stock in Sydney's inner west, see HD Inner West's guide to private power poles on rear lane terraces for how pole ownership and access work on that kind of property.

How High Demand Electrical helps

High Demand Electrical is one of Sydney's most trusted Level 2 ASPs for private power pole work, and phase allocation is one of those details that's easy to get wrong if it's treated as an afterthought rather than part of the actual connection design. Whether you're repairing an existing pole, replacing one after storm damage, adding a second connection point, or upgrading to three phase, our licensed local team checks the correct phase assignment against the Service and Installation Rules of NSW table, confirms it against what's already connected on your street where that information is available, and documents it properly on the Notification of Service Work submitted to your network. As a Level 2 electrician team, we service pole fed properties right across Sydney's West, South West and Sutherland Shire, not just the easy jobs on a standard street frontage.

Private Power Pole Phase Selection FAQs (Sydney)

Does Ausgrid use the same phase table as Endeavour Energy?

Both networks work from the same Service and Installation Rules of NSW, so the street or lot number phase table applies the same way whichever distributor serves your property. See our power pole installation services page if you're planning a new connection or a pole replacement and want the phase assignment handled correctly from the start.

What happens if my neighbour and I end up on the same phase anyway?

It can happen, particularly on battleaxe blocks, corner lots or properties with unusual lot numbering where the simple last digit rule doesn't map neatly onto physical street position. The network still applies the standard table, and any genuine imbalance that develops over time is something the distributor manages at a network planning level rather than something an individual customer needs to fix.

Can I request a different phase if I think it will help my solar or EV charger?

No, phase selection for a single phase connection isn't a customer choice, it follows the Service and Installation Rules of NSW table regardless of what you're running on the circuit. If you're adding solar, a battery or an EV charger to a pole fed property and you're concerned about capacity, the better path is checking your voltage rise and consumer mains sizing rather than trying to select a particular phase.

Does subdividing my block or adding a second dwelling change the phase rule?

A new connection created by a subdivision or a second dwelling on the same title is still treated as a new single phase connection for phase selection purposes, so the same street or lot number table applies to it. If the new title needs its own private pole rather than reaching the street directly, that's a separate question we cover in our guide to when you need a new private power pole for a subdivided block.

Is phase selection something I need to ask my electrician about, or does it happen automatically?

It happens automatically as part of a properly documented connection, your Level 2 ASP applies the table and records the phase on the as built sketch and Notification of Service Work submitted to the network. It's worth asking about directly if you're dealing with a reconnection after damage, simply to confirm the installer is restoring the original phase rather than treating it as a brand new connection.

Get a Private Power Pole Quote

If you need a new private pole connection, a repair, a reconnection after storm damage or a three phase upgrade on a pole fed property, get a private power pole installation quote from High Demand Electrical. Call 0402 559 777 to talk through your situation. Every job needs a site assessment before scope or pricing can be confirmed, since the right phase, cable size and pole specification all depend on what's actually on site.

Why Does Your Street Number Decide Which Phase Your Private Power Pole Connects To?