Does Your Sydney Building Site Need a Private Power Pole for Temporary Builder's Supply?

Does your Sydney building site need its own private power pole for temporary builder's supply? Usually yes, if the site cannot safely take power straight from the street or an existing building, and the standard answer is a removable timber structure called a split post, built and sized to its own set of rules under the Service and Installation Rules of NSW (SIRNSW). It is not the same thing as a permanent private pole, but it is not a free for all either, and getting it wrong is a common reason a construction site gets a stop work direction from its own electrical contractor before works have even started.

⚡ Quick Answers: Temporary Builder's Supply and Split Posts

• Does every building site need a private pole? No. Only sites where there is no suitable point of attachment on an existing structure, where the span from the network's asset pole is too long, or where overhead access simply is not practical without one.
• What is a split post? A temporary private pole built from two sections of timber bolted together specifically to carry a builder's overhead service for the life of a construction project, then removed.
• Is a split post the same as a permanent private pole? No. It is purpose built for temporary use and dismantled once the site no longer needs it, but it still has to meet SIRNSW's sizing, bolting and inspection rules while it is in the ground.
• How big does a split post need to be? A minimum of 150mm by 150mm in cross section, fixed together with two 16mm bolts spaced 600mm apart, with the ground section sunk to the same depth required for a permanent pole.
• What cable feeds it? At minimum, 6mm² copper thermoplastic sheathed cable in flexible PVC conduit, sized up if the site's actual demand needs a heavier supply.
• Who installs and removes it? A Level 2 Accredited Service Provider (ASP), the same accreditation required for a permanent private pole, because a split post still connects into the network's overhead system.

1. When a building site actually needs its own pole

Most residential renovations and smaller builds in Sydney can run their tools, lighting and site amenities from the existing property's supply, often through a temporary distribution board fed from the house's own switchboard. A dedicated private pole only becomes necessary when that option is not available: a knockdown rebuild with no structure left standing to attach to, a vacant block, a build set well back from the street, or a site where the overhead span from the network's own asset pole would otherwise be excessive or cross a neighbouring property. In those situations, a split post gives the site its own temporary point of attachment, independent of anything that might be demolished, extended or otherwise altered mid project.

2. What a split post actually is

A split post is not a scaled down version of a permanent private pole, and it is not an off the shelf product either. SIRNSW specifically allows a builder's service to be supported on either a removable pole or post, or on a split post made from two sections of timber bolted together. The split construction matters because it makes the whole structure easy to install and remove without leaving a permanent fixture behind once the site's own supply takes over. A Service Equipment enclosure (the meter and protection gear for the temporary connection) mounts on the post itself, and the overhead service runs from there back to the network's point of supply, typically a 100A single phase connection for most residential sites.

3. Split post sizing and construction rules

SIRNSW Clause 3.8.1 sets out exactly what a compliant split post looks like, and it is more specific than most contractors expect. The two timber sections must be fixed together with two 16mm diameter bolts and washers, spaced 600mm apart, with a minimum of 150mm clearance to the timber ends so the bolts do not split the wood. The combined cross section has to be at least 150mm by 150mm, and the ground facing end of the post is capped or chamfered to shed water rather than left flat and exposed. The post is erected so the line of the fixing bolts runs in the same direction as the proposed overhead service, and the base section is sunk to the same depth required for a permanent post of that size, following the same soil quality and depth tables used for permanent pole installations. None of this is negotiable scaffolding timber from the site shed. It is engineered, inspected infrastructure for the life of the connection.

4. What feeds the split post

The consumer mains running from a split post's Service Equipment enclosure through to the site's temporary distribution board also has a minimum specification under the same section of SIRNSW: at least 6mm² copper thermoplastic insulated and sheathed cable, installed inside flexible PVC conduit that meets AS/NZS 2053 Part 4, subject to what the site's actual maximum demand works out to be. A small renovation drawing modest power for hand tools and lighting will usually sit comfortably within that minimum. A larger commercial or multi trade site, running compressors, welding equipment or site offices with air conditioning, needs its demand properly calculated rather than assumed, since undersizing the consumer mains on a busy site is one of the more common causes of nuisance tripping and voltage drop complaints once work actually gets underway.

5. Why this is Level 2 ASP work, not a standard electrician's job

A split post connects directly into the network's overhead distribution system, the same as any permanent private pole, which puts it on the network side of the installation rather than inside it. Only a Level 2 Accredited Service Provider is authorised to install, alter or remove this kind of connection, liaise with Ausgrid or Endeavour Energy on the network's behalf, and sign off the paperwork the distributor requires before energising supply. A standard licensed electrician can wire everything downstream of the Service Equipment enclosure, the temporary distribution boards, RCDs and outlets that actually power tools on site, but the pole, the overhead service and the point of attachment itself need a Level 2 ASP's accreditation from the first bolt in the ground.

6. Inspected before every use, not just at installation

Unlike a permanent pole, which is typically inspected on a multi year cycle, SIRNSW expects a builder's service post to be in good condition and inspected before each use by the contractor responsible for it. On a longer running site this matters more than it sounds: a split post left in the weather for months while other trades work around it can pick up rot, loosened bolts or wind damage well before the site's final fix stage, and a quick check before each major use catches problems before they turn into an unplanned outage or, worse, a safety incident for anyone working nearby.

7. From temporary supply to the real connection

Once the building is far enough along to take its own permanent supply, whether that is a new private power pole at the same location, an overhead or underground connection direct to the property, or a reinstated connection to an existing structure, the split post comes out and the temporary connection is formally disconnected with the network. This transition is worth planning early rather than leaving to the last minute, since it usually needs its own round of applications and inspections, not unlike the full disconnection to permanent supply sequence we cover for knockdown rebuilds more broadly.

8. Common mistakes that cause delays

The split posts that cause problems on site are almost always the same handful of shortcuts: timber undersized for the 150mm by 150mm minimum, bolts spaced closer than 600mm so the post splits under load, no cap on the exposed top letting water in over a long build, or a consumer mains run with whatever cable was on hand rather than the correct 6mm² minimum in proper conduit. Any one of these can mean a failed inspection, a delayed energisation, or a defect notice landing on a site that is already under time pressure. Getting it built correctly the first time, by a Level 2 ASP who knows the SIRNSW requirements rather than general building standards, avoids all of it.

How High Demand Electrical Power Pole Helps

High Demand Electrical is one of Sydney's most trusted Level 2 ASPs for private pole and temporary builder's supply work, servicing sites across Sydney's West, South West and Sutherland Shire. We size and install split posts to the actual SIRNSW specification rather than guessing from what was on the last job, handle the network applications and inspections that come with a temporary connection, and manage the transition to permanent supply once your build is ready for it. If you are quoting a project that will need its own temporary pole, we are a licensed local team, not a call centre, and we can scope the whole sequence from first application through to final disconnection.

Temporary Builder's Supply FAQs (Sydney)

Can I build my own split post to save on the job?

No. Even though the timber and bolts themselves are simple materials, installing, connecting and energising a split post is Level 2 ASP work because it ties directly into the network's overhead system. See our temporary builders supply services for how this is scoped.

How long can a split post stay in place?

There is no fixed expiry date in the rules, but it has to stay in good condition and be inspected before each use for as long as it remains connected. On longer projects we recommend a scheduled check rather than waiting for a problem to show up.

Does a split post need Dial Before You Dig like a permanent pole?

Yes. Sinking a post, temporary or permanent, into the ground near a building site still requires a search for underground services first. See our guide to why every private power pole job starts with a Dial Before You Dig search for the detail.

What happens to the split post once the build is finished?

It gets removed once the site's permanent connection is live and the temporary supply is formally disconnected with the network. If your final connection will itself be a new private power pole, see our pole maintenance and pole inspection and condition reporting services for what ongoing care looks like.

Does the bracket and bolt advice for permanent poles apply here too?

The same underlying engineering standards apply, but a split post follows its own specific sizing rules rather than the permanent pole bracket requirements. For the permanent version, see our guide to private power pole brackets and anchor bolt requirements.

Planning a build that will need temporary power before your permanent connection is ready? Get a Temporary Builder's Supply Quote from High Demand Electrical Power Pole, or call 0402 559 777. Every site is different, so we always confirm scope and pricing with a site assessment before work begins.

For general Level 2 electrical work across Sydney beyond pole and construction supply, see our main site's Level 2 electrician services, and if your project is in Sydney's inner west our sister site has local guides to private power poles on inner west terrace and rear lane properties.