Two Private Poles, One Block: How an MDC Coordinates Power for a Duplex or Dual Occupancy Build

Why would a duplex or dual occupancy build need two separate private power poles instead of one? Because once a block is subdivided into two dwellings, each one legally needs its own independent electricity connection, and if the site layout means one or both dwellings cannot reach a single shared point of attachment, each connection needs its own pole. An MDC, the panel arrangement the network's own rules allow for coordinating more than one connection on the one site, is how the applications, isolation and metering are kept properly separate from day one rather than sorted out after the fact.

⚡ Quick Answers: Two Private Poles on One Block

• Do both dwellings really need their own pole? Only if neither can reach a shared point of attachment within the allowed span, or a pole is the only way to avoid running a service across the other dwelling's part of the block.
• What is an MDC? A Master Distribution Centre, a metering and isolation panel that lets a distributor register more than one connection point on a single property without the supplies being mixed together.
• Can one pole feed both dwellings instead? Not as two independent supplies. Each connection point needs its own protection and metering, so a single pole can only host two separate connections if it is built and approved to do exactly that.
• When should this be organised? Before the slab goes down. The pole location, the trenching route and the network application all need to be locked in while there is still access to dig and position equipment.
• Who lodges the connection applications? Your Level 2 ASP typically lodges both applications together, referencing the MDC panels supplied for each dwelling, so the network treats them as two coordinated jobs rather than two unrelated requests.
• What happens to the builders supply? A single temporary builders supply usually runs the whole site during construction, then gets split into the two permanent connections once each dwelling is ready.

1. Why a subdivided or dual occupancy block can need two poles, not one

Our general overview of electrical connections for duplexes and granny flats covers the basics of how a new dwelling gets connected. This article goes further, into the less common scenario where site layout forces two separate private poles rather than one shared connection point. Most people assume a duplex or a dual occupancy site just needs "a connection", singular. In practice, the moment the block is subdivided or the second dwelling is created, the network is being asked to supply two customers, not one. Each dwelling needs its own point of attachment, its own consumer mains and its own metering, whether that ends up being two separate poles, a shared pole built for two connections, or one dwelling reaching the street directly while the other needs a pole to avoid crossing the first dwelling's land.

Where a pole is genuinely required rather than optional, the network's Service and Installation Rules are specific about it: a private pole is called for where there is no suitable location on the building itself, the span back to the street is too long for an aerial or suspended service, or the only alternative would mean crossing a neighbouring property. On a subdivided block that is exactly the situation the rear or side dwelling is often in, since it usually sits further from the street than the original house did.

2. What an MDC actually is and why the rules allow it

An MDC, short for Master Distribution Centre, is the panel arrangement that lets a builder or Level 2 ASP present a network with more than one connection point on a single property in an orderly way. Rather than two separate metering boxes appearing on site with no clear relationship to each other, the MDC groups the isolation and metering equipment for each dwelling so the network, the Metering Coordinator and the retailer can all see clearly which equipment belongs to which unit.

This matters because the rules governing multiple installations on one site (SIRNSW Clause 4.13) specifically list duplex units among the examples of a multiple installation, alongside flats, units and factory or shop groupings, and require the customer to provide for supply to each separately metered portion of the site. For anything beyond the simplest case, the rules direct the builder to involve the electricity distributor and its Metering Coordinator early, precisely because getting two connection points onto one property without confusion is a coordination problem as much as a wiring one.

3. Applying for two connections at once, not two connections in sequence

The single biggest mistake on these builds is treating the second dwelling's connection as an afterthought once the first one is sorted. Both applications should go in together, each referencing its own MDC panel, so the network can see from the outset that it is dealing with two coordinated connections on one address rather than a second, unrelated request arriving weeks later. This also lets your Level 2 ASP flag upfront which unit needs a new private pole, which is keeping its existing point of attachment, and which is converting from a temporary builders supply, so the network's assessment covers the whole site in one pass instead of two.

Where the supplies do end up sharing infrastructure, such as a common trench for both sets of underground consumer mains, the rules are equally clear that the two supplies must never be paralleled or mixed within the installation. Each connection stays its own isolated circuit from the pole through to its own switchboard, even when the physical trench or the private pole standing arrangement is shared.

4. Where each pole can go, and why the front boundary rule matters

A private pole cannot just go wherever is convenient for the build. The rules require a private pole to stand within one metre of the front boundary, be sunk to a depth appropriate to the soil and the height of the attachment, and be clearly marked as a private pole so it is never mistaken for network infrastructure. On a dual occupancy block, this generally means the front dwelling keeps a more conventional point of attachment, while the rear or second dwelling's pole is positioned as close to its own frontage as the site layout allows, rather than tucked away down a driveway purely for convenience.

Getting this location right early avoids a common and expensive problem: a pole positioned to suit the builder's access during construction, then found to be in the wrong spot once landscaping, fencing or a driveway is finalised for the completed dual occupancy.

5. Trenching, phase selection and keeping supplies separate

Where both dwellings run underground consumer mains from their respective poles, it is common and efficient to dig one trench and run both sets of conductors together, along with any communications conduit such as NBN, provided each service stays in its own conduit and the supplies are never joined. Overhead single phase connections are also allocated a specific phase based on the last digit of the lot or street number under the network's phase selection table, which is one of the small details a Level 2 ASP checks for each dwelling individually so the load ends up genuinely balanced across the street's network rather than both new connections landing on the same phase by coincidence.

6. From temporary builders supply to two independent connections

Almost every duplex and dual occupancy build runs on one temporary builders supply for the length of construction, well before either dwelling has its own permanent connection. As each half nears completion, that single temporary supply is progressively replaced: one dwelling might convert its existing temporary supply arrangement into its permanent connection, while the other gets an entirely new pole and consumer mains run for the first time. Our guide to duplex electrical connections for builders covers this staged handover in more detail for sites that do not need a second private pole; the MDC and pole scenario in this article is the more involved version of the same underlying problem. Getting the sequencing right, so neither dwelling loses power longer than necessary and the site is never left with an ambiguous, half converted supply, is one of the more coordination heavy parts of the whole build.

7. The paperwork that catches builders out

Beyond the connection applications themselves, a dual occupancy or subdivided block generates its own paperwork trail: a Notice of Service Work for each connection, a Certificate of Compliance for Electrical Work once each dwelling's installation is tested, and, for underground runs, an as built route sketch kept with the meter box showing exactly where each service travels. Because two dwellings are involved, it is easy for one set of paperwork to lag behind the other, particularly when the two units are being sold separately or titled under different arrangements. Locking in both applications together from the start, referencing the MDC panels supplied for each unit, is the simplest way to keep both paper trails moving at the same pace.

Why it's Level 2 ASP work

Installing a private pole, running consumer mains from it, and connecting or disconnecting a supply at the point of attachment all sit outside what a standard electrical licence covers. This is accredited service provider territory, and coordinating two connection points on one site through an MDC arrangement raises the stakes further, since a mistake affects two separately titled properties rather than one. A Level 2 electrician handles the network side of both applications, the private power pole installation for whichever dwelling needs one, and the consumer mains installation back to each switchboard, so the whole site is treated as one coordinated job rather than two separate contractors working to different assumptions.

Suburb Case Study: Eastwood

Problem: A newly subdivided dual occupancy site in Eastwood NSW 2122 needed two independent, permanent 63A three phase connections. The rear unit's site layout meant it could not reach the existing overhead arrangement at the front of the block, while the front unit was still running on a shared temporary builders supply alongside it.

Work completed: High Demand Electrical lodged both network connection applications together, referencing the MDC panels already supplied for each unit. A new private pole was established for the rear unit at the edge of the site, with underground consumer mains trenched from the pole to its meter panel. The front unit's temporary builders supply connection was converted into its own permanent arrangement, sharing the trenching effort but kept on entirely separate conductors. Communications conduit was laid in the same trench for both units while the ground was open.

Result: Both dwellings were energised on independent, separately metered connections, each fully tested, commissioned and documented, with the network able to identify and manage each unit's supply on its own record from day one.

How High Demand Electrical helps

High Demand Electrical is one of Sydney's most experienced Level 2 ASPs for exactly this kind of multi connection build, having coordinated private pole and MDC arrangements across duplex, dual occupancy and subdivided sites throughout Sydney's growth corridors. As a licensed local team rather than a call centre dispatching whoever is free, the same people who lodge your network applications are the ones who install the poles, run the consumer mains and complete testing and commissioning, so nothing gets lost between a builder's scope and what the network actually approves. Every job still starts with a proper site assessment, since no two subdivided blocks have the same access, soil conditions or existing infrastructure to work around.

Two Private Poles, One Block FAQs (Sydney)

Does every duplex need two private poles?

No. Many duplexes connect both dwellings from a single shared point of attachment or a pole built and approved to serve two connections. A second, separate pole is only needed when site layout, span limits or avoiding a crossing over the other dwelling's land make it the only compliant option.

Can I apply for the second connection later, after the first is finished?

You can, but it usually costs more time than it saves. Lodging both applications together lets the network assess the whole site once, rather than reopening an assessment for a second connection that could have been coordinated from the start. See Level 1 network installation for how network applications are handled.

What's the difference between an MDC and just two separate meter boxes?

Two meter boxes with no clear relationship to each other can confuse a network trying to work out which equipment belongs to which title. An MDC groups the isolation and metering for each connection in a way the distributor and Metering Coordinator can read at a glance.

Which network am I connecting to for a dual occupancy build?

It depends on where the block sits. Use our postcode checker to confirm whether you are in Ausgrid or Endeavour Energy territory before either application is lodged, since the two distributors handle multiple connection sites slightly differently.

Does the private pole need council approval as well as network approval?

Sometimes, depending on the pole's height, position relative to boundaries, and the council area. Your Level 2 ASP will confirm what applies to your specific site as part of the site assessment before any pole is ordered.

Get Your Dual Occupancy Connections Sorted Properly

If you are building a duplex, dual occupancy or subdivided block and need two coordinated connections, get in touch before the slab goes down rather than after. Get a Private Power Pole Quote or call 0402 559 777. Every site is different, so pricing and pole placement are confirmed after a proper site assessment, not before.