Temporary Builders' Supply Sydney: What Construction Sites Need

What is temporary builders supply, and does your construction site need one? Temporary builders supply (TBS) is a metered power connection installed before a building exists, usually on a dedicated builders pole, so your site has proper power for tools, lighting and sheds from day one. Any Sydney build that needs more than a generator can sensibly provide will want one, and only an accredited Level 2 electrician can connect it to the network.

1. What a TBS actually is

A TBS is a real network connection, not an extension lead from next door. It has its own meter, its own main switch and safety switches, and its own agreement with your electricity retailer, which means the site pays for exactly what it uses at normal rates.

On most Sydney sites it takes the form of a builders pole near the front boundary carrying a weatherproof switchboard, fed by an overhead service from the street. Where the street mains are underground, the supply can come up from a pit or pillar instead, which is one of the details settled at the site assessment.

2. What the rules require for a builders pole

The Service and Installation Rules of NSW treat a builders service as its own category, with the detail sitting in clause 3.8. The post itself must be solid, typically a split timber post of at least 150mm by 150mm, with the crossarm fixed by two 16mm bolts spaced 600mm apart, and the setup is rated for an overhead service of up to 100 amps.

Even the wiring between the service and the board is specified: the consumer mains on a builders pole can be as small as 6mm² copper in flexible conduit, provided the site's maximum demand allows it. None of this is guesswork, which is exactly why a proper Level 2 electrician builds it rather than the site carpenter. If you want to see the rule itself, our free NSW electrical rules clause finder includes a builders pole diagram you can download.

3. The smarter option: build the permanent board early

The rules also allow a build to skip the dedicated pole in the right circumstances. If the permanent switchboard position is already decided, supply can be connected to a temporarily supported switchboard sitting in its final location, with a permanent earth installed from the start.

Done well, this means one connection instead of two: the board that powered the build becomes part of the finished installation. It suits knockdown rebuilds and granny flat projects where the layout is locked in early, and we flag it at quoting stage whenever it will save money.

4. Safety on site: what happens after the meter

Once the TBS is live, the wiring on the site side has to meet the construction wiring standard AS/NZS 3012 as well as the Wiring Rules. In practice that means safety switch protection on the outlets, proper weatherproof gear, and leads and equipment that are inspected, tested and tagged on a regular cycle for the life of the build.

An overloaded or badly maintained site board is one of the most common causes of lost days on small sites. Sizing the TBS around the real tool load, including the crane, the lift or the site shed air conditioning, is part of the design conversation, not an afterthought.

5. Getting it connected: applications, metering and paperwork

A TBS follows the same connection pipeline as any new supply. An application goes to your distributor, and Ausgrid and Endeavour Energy each run their own process, so check your network area in seconds with our postcode checker if you are not sure which one covers the site. You will also need an electricity account with a retailer so the meter can be assigned.

After the physical work, the ASP lodges a Notification of Service Work with the distributor, the same document we explain in our guide to when a load increase triggers an NOSW. Applying properly and early is the single best way to protect your start date, because the rules are clear that connections can be delayed where no written application was made.

Why it's Level 2 ASP work

Everything from the network to the meter is regulated service work. Erecting the pole to the required standard, running the overhead service or underground service, terminating the consumer mains and energising the board can only be done by an accredited Level 2 ASP authorised by the distributor. The same applies at the end of the job, when the TBS is disconnected and removed or the supply moves to the permanent connection.

How High Demand Electrical helps

We run the whole TBS process as one job: the site assessment, the distributor application, the pole and board built to the service rules, the metering arranged with your retailer, and the NOSW lodged when it is energised. Because we also do private power poles and permanent connections, we will tell you straight when a temporarily supported permanent board beats a dedicated builders pole for your site.

At the end of the build we handle the switch to permanent supply and the removal of the TBS, so there is no orphaned pole sitting on the nature strip six months after handover. For what the network checks before energising anything, see our guide to the Level 2 site inspection.

Need site power sorted before the slab?

Get the application moving before your start date is at risk. Get a temporary builders supply quote or call 0402 559 777. Every job starts with a site assessment so scope and pricing are confirmed before any work begins.